Malicious PDF — malware analysis report

Static analysis result for SHA-256 292c19cf472db71a…

MALICIOUS

PDF

72.2 KB Created: 2021-02-18 17:52:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cf419037967a22bf077f9cd1edb390a3 SHA-1: a4c1831b856517f8aa51cf5fe16f8b566d3dc4f7 SHA-256: 292c19cf472db71ac5a6c412e575d8f63f9869c497b9861b997986793b31274f
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm designed to redirect users to various PDF downloads, including one related to 'supersu pro apk download'. The presence of these numerous, low-reputation URLs suggests a phishing or malware distribution attempt.

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://seumenha.ru/wix?keyword=supersu+pro+apk+download PDF link annotation
    • http://magnetfix.store/16584519459yz8s5.pdfIn PDF document text
    • http://neo-tp.ru/mokajimanamejamojafagepimh29m.pdfIn PDF document text
    • https://fufajogaxofamu.weebly.com/uploads/1/3/4/6/134627879/difasirukupubavenes.pdfIn PDF document text
    • http://hookup154.site/tolanotapaxetage1zc0f.pdfIn PDF document text
    • http://livethailand.fun/automotive_bailment_agreement_formgn1v8.pdfIn PDF document text
    • http://sparzha.club/wusawipufog3tlvo.pdfIn PDF document text
    • https://likobikumenaf.weebly.com/uploads/1/3/5/9/135961418/bibewab_dokemuwidu_vonabogudawex_ruzabefol.pdfIn PDF document text
    • http://gallery-shop.site/how_to_trade_the_trend_in_forexxfvoo.pdfIn PDF document text
    • http://umdtheatre.ru/97850044526b9p14.pdfIn PDF document text
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/zidomoririsew_toromekek_rowuk_wifemelo.pdfIn PDF document text
    • http://rat-red.space/85645455226clomq.pdfIn PDF document text
    • http://lnstagramverifycentre.com/disifuzuwifebukomatqqlnc.pdfIn PDF document text
    • http://all-casino.xyz/26737247397xnr3u.pdfIn PDF document text
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/847bf32760e.pdfIn PDF document text
    • http://voicebftyi.com/ethical_values_in_report_writingn3ip6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_5fc745995382d.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/rebesudanolo/lavebubuvabawubokimazam.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/6152570124.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/19105550860.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_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 5212 bytes
SHA-256: c85fd2ada386e2dee0f7b202a22f9bd99f4bbc33167b38f25caf8ee284ce2d5f
font_01_sfnt_off0000f069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 10320 bytes
SHA-256: 08f38caffd20c3d520a41c91e10c51fd6b87f3d09624583cd7972bb4bc7b9993

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