Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ece2f13649f4a9c…

MALICIOUS

PDF

82.3 KB Created: 2021-09-20 15:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62f11f6fa001118d574b2b531fe01697 SHA-1: 03f656ca4b65635f54a556207aaf500be35e31e1 SHA-256: 6ece2f13649f4a9c4535c98587ad710219d56853b3bfe50f9b6afd6fb48683d7
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. Several heuristics point to the document being a link farm hosted on potentially compromised or disposable domains, designed to redirect users to malicious content. The presence of a 'Password-protected archive handoff' heuristic strongly suggests the document is intended to trick the user into downloading an encrypted payload, which is then likely decrypted with a password provided within the document itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.mbk-montage.nl/ckfinder/userfiles/files/82150927048.pdf In PDF document text
    • https://phm.vn/upload/files/5492787110.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/7mt216ds9n2ci2tdnoki3m34r0/88399093232.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/zunizedi.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/80074237586.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/godikuxid.pdfIn PDF document text
    • http://dd-eng.com/files/files/tidagureluxoriv.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/84502099721.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/mivojuba.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/69891966921.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/24895242948.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/vorobekujelaroramumovo.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/tozajajapifipovoduw.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/15158097203.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/94636063604.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140a7ae4cfc3---86639409763.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/lojiwi.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/sopanurutenigobus.pdfIn PDF document text
    • http://hflchw.com/upload/file/77895982643.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/24462214175.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/74572193917.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/pupagikupegoligef.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/ad9aa5d3174e26b21517d20b542c5e16/tajizijufu.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138376eebc8d---67183433220.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/xeret.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=gta+sa+visa+2+apkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB55 19004 bytes
SHA-256: d20a1d5bb8a9d569a0f311b03650911b66199739835922f9130cda881efbb775
font_01_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 10060 bytes
SHA-256: 23cbdae1c4d46b87360020260a6312984cb0da1cc36a04f59be3d7b0b3cc0507

Open this report in the interactive analyzer, or submit your own file for analysis.