Malicious PDF — malware analysis report

Static analysis result for SHA-256 6780c162d16021c6…

MALICIOUS

PDF

75.8 KB Created: 2021-03-21 09:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c0e5a272fd0b597cadf07ec7ec31ef0 SHA-1: a67f6e702439f0fb7cdbe7fc48204dc612e219ac SHA-256: 6780c162d16021c6b47d60cce174689ea210626f3303234685528d0b3b549731
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were extracted, the presence of an external URI suggests the document is designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=the+scarlet+letter+answer+key
    • https://cdn-cms.f-static.net/uploads/4372085/normal_5fd307122a87c.pdf
    • https://cdn-cms.f-static.net/uploads/4416319/normal_60426d13e6917.pdf
    • http://xojuxelase.medianewsonline.com/list_of_adjectives_in_english_for_beginners.pdf
    • https://cdn-cms.f-static.net/uploads/4450428/normal_601f39df98fb2.pdf
    • https://cdn-cms.f-static.net/uploads/4452171/normal_603c3d1452af2.pdf
    • http://ruvujagefeko.mygamesonline.org/1984_chapter_1_and_2_questions_and_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4485014/normal_604d70d086620.pdf
    • http://xeratigike.medianewsonline.com/something_anything_nothing_grammar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_6764cb1f765c4727bcc3d448dab2cddc.pdf?index=true
    • https://s3.amazonaws.com/dopugaxelelema/cabinet_office_manual.pdf
    • https://s3.amazonaws.com/wemofodi/external_audit_risk_assessment_template.pdf
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_998bfb25428f4dedb5b9a2091d4392fa.pdf?index=true
    • http://tirigofov.atwebpages.com/66429857300.pdf
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_b588dcf27c564fa8b8d6c096b3aa0a7f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea4ad1fa-183d-46f0-b774-f8efc17ef02c/gositelizonekasodatobe.pdf
    • http://nojisibi.rf.gd/26855972120.pdf
    • https://s3.amazonaws.com/tutapaxi/kibogetoj.pdf
    • https://uploads.strikinglycdn.com/files/8f8ce6ad-2f07-4324-be0a-1b345a9e317a/5990280648.pdf
    • http://fubatasofofezo.rf.gd/86010908289.pdf
    • https://uploads.strikinglycdn.com/files/ade81d54-7731-4bc7-9a2d-8f8e73d9b736/does_myofascial_release_hurt.pdf
    • http://nujenikob.epizy.com/gusewozazun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed1f.bin
078183a6458cbd43452bba543d767bff5bcc0797dddb467ccd6694a92a658ead
pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 5092 bytes
font_01_sfnt_off0000fe80.bin
6bb7b639b8720301b1630e809a4f8bf42437d91d6a36c3fa36cbb20ca3f8cd4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 10384 bytes