Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cca1b6766cbfbc…

MALICIOUS

PDF

76.5 KB Created: 2021-02-27 01:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cfbce83b6b14da3948f025260e98b5a1 SHA-1: 9011786abd3859a1a9452fdd2bbd920f7ffb1338 SHA-256: 74cca1b6766cbfbc6102a661a9cbd7d7375786e5e499dc7aebb12688d6d4f5bf
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://botokaw.ru/strik?utm_term=sentry+safe+s3877+battery+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490739/normal_600a850b63bd0.pdfIn PDF document text
    • http://it50disconto.info/wimajefewowinuvuzu6a84u.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/hdagio1/31727248053.pdfIn PDF document text
    • http://upsbox.ru/lowulisogijefemzyy1.pdfIn PDF document text
    • https://cdn.sqhk.co/tugadeboda/4che2tq/gufipozidimo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fe678ca7c9aa.pdfIn PDF document text
    • http://cashthe.ru/pupapowihyoq.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/oster_bread_maker_5838_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/tubivuvopitu/igWjcge/junafodomonatuvixawagani.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/58623995433.pdfIn PDF document text
    • https://cdn.sqhk.co/tolademapati/61xWign/fobijab.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/matiti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejarisiwudu.atwebpages.com/82589625111.pdfIn PDF document text
    • http://jijabivu.epizy.com/eigenvalues_and_eigenvectors_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/61610132106.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/7294795351.pdfIn PDF document text
    • http://tanikotik.epizy.com/3224000511.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/10546169397.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_off0000ecee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEE 5944 bytes
SHA-256: 3ddb341b2d1734437f035659150e0a8f6616bb6b67b4400a436c8901a975dded
font_01_sfnt_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 10344 bytes
SHA-256: e8ce1c94e0aacb6678bfafe6d8499f35699fe71167d67bcbeba40e6fd39fca21

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