Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60bffd298d1117e…

MALICIOUS

PDF

102.1 KB Created: 2021-08-16 07:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 20aed158eb608fa187087a97279bc9f3 SHA-1: 9292491d3559aadd9247055723590125a34fdb82 SHA-256: e60bffd298d1117e8aba57b69480f98237a7bbbb1d0d4b3581b2fa7c26844a0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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=minecraft+mod+paketi+1.7+10+hexxit PDF link annotation
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ft2pdkbp3gen0u08e0uclup821/29097633473.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/70189393871.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f598d820b---nuramerujenavorimupot.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117352ce5cb9---sobulasejuwol.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/detiv.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/31906715346.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65642cd6af---43295069506.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3206968dd3---dupawugetubonu.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/24237674266.pdfIn PDF document text
    • http://bethanybaptistcolumbus.org/clients/75549/File/nuwuge.pdfIn PDF document text
    • http://sns.hu/_user/file/giwaxobetidabakalat.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be438234e93---65681026740.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/durizowukezebidot.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/suzebawefesibogij.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947b3270de3---fakopimagoforajin.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/98104217759.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/nitasogebegezimosir.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/e97e683322f3ab8909b3c46a24005f25/16962477794.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l9o0skvjh61vhmsenqoia78bt0/73383216324.pdfIn PDF document text
    • http://techcessgroups.com/userfiles/file/90637411258.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/gekilofa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000128e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E5 16064 bytes
SHA-256: a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
font_02_sfnt_off00013dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFA 11148 bytes
SHA-256: fc6ef59df17bbdee224ead612e1a9abbc464684d2303e03a7fb5b727de06e9d8
font_03_sfnt_off000157e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E2 19632 bytes
SHA-256: 1007d77386fadc0dc937b6486220c19c744378b40d0eeddd670f08a25a92b81b

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