Malicious PDF — malware analysis report

Static analysis result for SHA-256 26752ee054e9e5d8…

MALICIOUS

PDF

85.7 KB Created: 2021-03-07 10:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80316b8a26da250d4b2b999cc8de1c24 SHA-1: ebbe6209f052a67972a5c8f7ffe924ffc1ffb6a4 SHA-256: 26752ee054e9e5d866b2a7fba200b85df9d35c151c71cadf5971b5ebe7294a0f
126 Risk Score

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 0.9997

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://xezojetit.ru/strik?utm_term=codex+seraphinianus+for+sale PDF link annotation
    • http://livethailand.fun/top_10_soundbarsgiilz.pdfIn PDF document text
    • http://amst-watch-v2.club/overview_classification_of_matter_answerskxu68.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/dw1uhiE/2935441258.pdfIn PDF document text
    • https://cdn.sqhk.co/vofudejobif/YBadpji/42487491941.pdfIn PDF document text
    • http://hookup154.site/image_converter_plus_serial_key4cp2m.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/VFgiWjb/51796490409.pdfIn PDF document text
    • http://kupivse.xyz/41631914872t2rzz.pdfIn PDF document text
    • http://iblack.space/67775339685bny94.pdfIn PDF document text
    • http://shoppingyxplus.xyz/have_got_questions_and_short_answersc859b.pdfIn PDF document text
    • http://vinnipoh.space/265575159327dk9u.pdfIn PDF document text
    • http://bitsracing.net/kumiro1am1n.pdfIn PDF document text
    • http://50offstore.info/absolutism_in_europe_worksheet_answe2hhkh.pdfIn PDF document text
    • http://emmetrix.net/mazijexibuvupufagusovugwwf52.pdfIn PDF document text
    • http://vsspb.ru/andrew_mango_atatrk_ingilizcez3102.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44407f20-7244-4107-9544-84d8151b6f9a.filesusr.com/ugd/8508de_43c57cd5ce0f49e09d40e35f73b2a71e.pdf?index=trueIn PDF document text
    • https://636e06b3-920c-4898-b827-ef778bbbc101.filesusr.com/ugd/40512e_5d9ecbc86a7b44ca8fe7492612c168dd.pdf?index=trueIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_f991411923094ddab9f61dab53072a8c.pdf?index=trueIn PDF document text
    • http://jiruroxi.epizy.com/tamuwubunininalilizu.pdfIn PDF document text
    • http://rajokawaxes.rf.gd/17411413386.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_d7e1d478c0434a1f82db2fdedfaf0acc.pdf?index=trueIn 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_off000112b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B6 5104 bytes
SHA-256: 3fdd826ed2c79c0b337e22ef83f164c605c3666bdffa60056bf0a1029eadbb55
font_01_sfnt_off0001240e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240E 10992 bytes
SHA-256: 2909089283dd6bf804a4ca4f55715eb8004a249329edd1a241790e022772f82d

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