Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14bec77b61f0ff5…

MALICIOUS

PDF

90.1 KB Created: 2021-09-20 19:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7ed2516bb71e25b69deb7f0ca3acf5de SHA-1: 96a59fd964ba5702d14fa412a2786ff68fbd29eb SHA-256: c14bec77b61f0ff55e682d02657b311720e949fc3fbdf50b455d0a8e834ccc57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and link farms points towards a tactic of overwhelming the user with potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://cructi.ru/uplcv?utm_term=pokemon+go+level+hack PDF link annotation
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143ad5262f7a---xoparorimape.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/1484016331.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/37661465866.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/pidanujovut.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/10912325172.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/povaxelozujabipepeza.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/50784593687.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/firalifeziwererajut.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/23137935853.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/a22704fa96bq0dt2rb5o91nnh3/gipideravigozixusamasad.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210915214553.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/werefudonuvukubabesapis.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/repabumebeleruvesifutivu.pdfIn PDF document text
    • https://sassanoproperties.com/FCKeditor/file/10932553598.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/31992825653.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/86869780390.pdfIn PDF document text
    • http://eva.am/files/01f8402c3ba51dc4.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/613e4abc91811c86d14c9e062f4c053f/givuxob.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/d72598b666153e69b5ae8fd76ac8e19a/88847157626.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/g9egoduc18fd8hgnit42ribmg7/50028727018.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/46180994209.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 10380 bytes
SHA-256: 8e1bfcdb5f536f511f31b2a05a1a6b7927b670429b1f1b7547def08c3c99e644
font_01_sfnt_off00011182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 19160 bytes
SHA-256: d319411cd5f64a4cd2d9d32c006f083105f3161a3c943a4201c33c8d91ace926
font_02_sfnt_off000142e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1