Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2ac31ae57dec80…

MALICIOUS

PDF

82.0 KB Created: 2021-04-02 08:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ff82a7127804fb42a2bd28df99b76b13 SHA-1: a9d2acd1d6202ab21dfc16c473411055c6a9a786 SHA-256: 3d2ac31ae57dec80e78161c96fcec86edb08a7e8a9f8897fc4e483de9700ba53
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a URL that appears to be part of a phishing or scam operation, disguised as a document about 'Oceans piano chords'. The presence of numerous links to disposable hosting and external URIs further supports its role as a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=oceans+piano+chords+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389801/normal_5fe052320995c.pdfIn PDF document text
    • http://qrettalq.online/is_new_yorker_subscription_worth_itaqj96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_605ff4d81596d.pdfIn PDF document text
    • http://helper-badges.com/18453794020jpa3d.pdfIn PDF document text
    • http://onlinetiser.website/overeaters_anonymous_food_plan_gray_sheet3j5vl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471095/normal_603b2704532ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_604564073f4b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416929/normal_5fc6499b73e55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5fcf32135b069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_6047cb612a074.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/xafedetab.pdfIn PDF document text
    • http://item-mask.top/football_training_fitness_drills3tien.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_60503d2beb937.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5ffa27f751cf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_60353af733d97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_600d452b6a977.pdfIn PDF document text
    • http://meetsalle.xyz/wibozowojixasituvosenudowjdjtt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/guvovigo/award_shows_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/52431883069.pdfIn PDF document text
    • http://benamow.myartsonline.com/play_nancy_drew_games_online_for_free_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/polarization_of_light_experiment.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/86203119630.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/lotafakejavenujerizelinoj.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 4944 bytes
SHA-256: 115a54e819eb9ef9b1f9bc68fe1d0b2563e32a09ebd1660244d435beaa1d5f0b
font_01_sfnt_off000106ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FF 11132 bytes
SHA-256: 4e13aee123f2fd7d3c6d7be31c5fd1b1c11e38710655222a6e2d5e748b6e6149
font_02_sfnt_off00012c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C73 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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