Malicious PDF — malware analysis report

Static analysis result for SHA-256 55060eaba7ceda3b…

MALICIOUS

PDF

109.0 KB Created: 2021-07-18 10:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a76d2b217e3ced2230348b08a85fd60e SHA-1: cef9d8522f467751603ae673ef50276e320ae1fb SHA-256: 55060eaba7ceda3b6312d4b91a7b5ead83fa864619d4d4eeab505944b8825da8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm with numerous URLs pointing to potentially compromised or disposable hosting, designed to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9294

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://dj-venci.com/uploads/pages/files/60590080927.pdf In PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/fanoboxigenokupefe.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607821dccfdb1---pekojudoziw.pdfIn PDF document text
    • http://yilip.net/userData/board/file/dufugadupipunodefujudube.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/xinesotuzulamovegemitap.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/37584372403.pdfIn PDF document text
    • http://flomojapan.com/upload/files/16655740054.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/baruver.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/r7q5olng0bjdg5oktgcq8fk12sjards5/vazalefipozamedisazof.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/a3e40a49b111e3f951dc0e71193c9b23/40340887705.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f6345a013---tesofirefajuboro.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/memalemotamawe.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608aea8b6a265---nejomiponewevenokut.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/14o9tf91br8uj4jomm8av8h3lc/jipudunipiponiw.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/0dd7deef2f8b0af658e70f84bf03a2b3/mujovisof.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/3016443070.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160acace4a182d---foxeseveji.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7acbef059---nanexiru.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/danewidavodomufisiwodut.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sabawujejefadopuroko.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b1c930ff6c5c679abe55a591fc0e1072/rugifo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df44bc2a54---86464200250.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817fa1b6922---jinewibixanozanosokitado.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/4287949914.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851d67943a9---15724312394.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908c0534015---12785139869.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3bd786a5d---rabozekavozu.pdfIn PDF document text
    • http://15441.p-world.jpIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=ainz+all+gownPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00018926.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x18926 17068 bytes
SHA-256: a203ff089ee7842bd77678b51879bedb31abf0790cac338651633e15812f55f9
font_00_sfnt_off0000ef2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 920 bytes
SHA-256: c22c4d7ac117fa5f2e644b4245cc9fbc52f6b373e0ccfc5e07f81b6a9d77acdf
font_01_sfnt_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 10252 bytes
SHA-256: 2c48353d45fdd085487919f92574374cc1f4db5c8f36e90b143cb6f0b1910854
font_02_sfnt_off000117f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F9 26368 bytes
SHA-256: 4bdd8e9753e33e178820d3d7522b0e68d68744c6f11964c2c90ce00316a5e38e
font_03_sfnt_off00015b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00017326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17326 9912 bytes
SHA-256: ddf5c0bb684b6cf05c0fc4c243d9cc6d9beb9979057bcfa13a011d0f61563489