Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc6934d27c21d28…

MALICIOUS

PDF

85.2 KB Created: 2021-08-01 06:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bcbe01fdd41891591fb881441c57a4f6 SHA-1: 1236483210b3d52a286b395e5ad0e849c7b9ac6c SHA-256: acc6934d27c21d2818c921318c6c77f2b329ff0ceeec5585550fe7ff57e6692a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm pointing to numerous compromised websites, likely intended to trick users into downloading malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions for accessing a password-protected archive, a common tactic to bypass gateway security. The ClamAV detection and ML classifier further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • 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://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3ed97e34e---rodatakarezilovitudabuzem.pdf In PDF document text
    • http://adamlegal.com/userfiles/file/50920439396.pdfIn PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/34178476347.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/52b7cce9d33cf5ce345470a997121171/78974030930.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/74656986442.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a78da846dee---9005882024.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105f11657c27---menuveve.pdfIn PDF document text
    • http://gptools.net/userfiles/file/zonovupaxefesebesemoturol.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/56015487541.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/vabasosi.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/70162869859.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/kazuninozosulowota.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///93789661808.pdfIn PDF document text
    • http://vitaminyplus.eu/files/file/nopebepositorofiwebulade.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/47412667569.pdfIn PDF document text
    • http://qca.ch/userfiles/file/sesosajepakobotigulevena.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/zotefabuz.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/nurubadaleped.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/67154f01177970565a10d9e03735b003/xusefe.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088bc1588c55---59875518006.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4162e8a0c---rulixakiropawu.pdfIn PDF document text
    • http://iviltra.lt/images/files/68552233853.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/68297834840.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/fbim0e55j3s36gmrsbjj8j4uc6/kufire.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/nupukaparutokidiwum.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/f9ebea8ea8be25e2485929d831f470c4/menaliposajiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=get+followers+instagram+apk+uptodownPDF 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_off0000e137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE137 11160 bytes
SHA-256: 3b0417f50c4e5f42457e46c59e987a96b89e453ec90a80ecdd6b841268ecac9f
font_01_sfnt_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 20020 bytes
SHA-256: 8738e143ebe02838ae2f9814b05765e012b3186751a264fc64e73aa90cc0d6c9
font_02_sfnt_off00012e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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