Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcc32326e494716…

MALICIOUS

PDF

86.3 KB Created: 2021-03-29 01:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 099c41b81734a85b0409b626679a2df8 SHA-1: 5a8ea78826a2b0d8615aa8f1031ca4374e3ed7ed SHA-256: 2dcc32326e494716ac3e38f0cdaba9c9303449bd8cbfb08695487a34d6892586
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=fifty+shades+darker+soundtrack+sia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408719/normal_6040283593049.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/simple_wealth_inevitable_wealth_barnes_and_noble.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450878/normal_602fefa782927.pdfIn PDF document text
    • http://wudenufodoroziv.scienceontheweb.net/do_worms_have_9_lives.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/pagexakorudumazusorofof.pdfIn PDF document text
    • http://xawezukazekexi.epizy.com/19783805977.pdfIn PDF document text
    • http://vukilef.rf.gd/wow_classic_cooking_guide.pdfIn PDF document text
    • http://zorufuzelal.rf.gd/hepatitis_c_easl_guidelines_2018.pdfIn PDF document text
    • http://xekuvazam.rf.gd/how_much_does_a_mechanical_engineer_make_in_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf0c862-5b37-4c7a-bba2-b20c559ac79b/84807426208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4989fe30-ee66-40fb-8360-557fd3cc8934/venuvixegek.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/subtracting_integers_word_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2792b3d-772c-466c-be7c-7d90580c4993/90304595965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852de69e-882d-4422-b5f7-95b2353cfbfd/ejercicios_trigonometria_secundaria.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/ditiwutije.pdfIn PDF document text
    • http://puzegekizizovin.epizy.com/komegurifopulanar.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/xawizig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcde4a15-910d-4417-b7cc-d9dc6fe4c4fa/garmin_vivosmart_4_manual_uk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED6 5196 bytes
SHA-256: 3522ae490535e955e050e6f7c2ead6365eaed3ae650a9dc11977fbcbec379645
font_01_sfnt_off00012090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12090 13948 bytes
SHA-256: e0877b9469964e95c9b5a1f0517d5f3b62b6e186297bf3d33cd65341bf2281ed

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