Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3542f1008ee957…

MALICIOUS

PDF

93.2 KB Created: 2021-02-28 09:53:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5710d7ac8db264d7733402a75e588f17 SHA-1: 1d5be4588779be3b9e8c46686c47e424056bf706 SHA-256: 9a3542f1008ee95717994f5340e9bc68849e92ed84298b8353bd60c950eb2b99
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=al+koran+bring+out+the+magic PDF link annotation
    • https://cdn.sqhk.co/porodiwaten/idhhZ03/xipevinuvasuzuz.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/jgjcUia/red_or_blue_loctite_for_gun_sights.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/cFigigK/66175317039.pdfIn PDF document text
    • http://fodosokidorakig.22web.org/guardians_of_the_galaxy_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/fghieYc/tikonebuwivajenida.pdfIn PDF document text
    • http://wuxapogetal.iblogger.org/rorofuwuwujejolabulaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416805/normal_6010b2fa57284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391315/normal_5fff0f60bdbe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5fe6398050093.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/harry_potter_castle_ride_universal_studios_orlando_lights_on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454047/normal_5fd102523859b.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
    • http://kizosit.rf.gd/abhimaan_1973_movie_free.pdfIn PDF document text
    • http://muwiliwus.epizy.com/pefitugidadadokirupu.pdfIn PDF document text
    • http://biguvuxurezuto.epizy.com/crosswords_with_friends_answers_6_12_18.pdfIn PDF document text
    • http://memunameno.epizy.com/65120857153.pdfIn PDF document text
    • http://zujexig.epizy.com/lodor.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_off0001227b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227B 5112 bytes
SHA-256: 57d38ea98a0ac66d92b8779a0a3824917ba6db1943e8f0f183b78559548d4602
font_01_sfnt_off000133b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B0 10716 bytes
SHA-256: 770713cd11a54a6506cd5c1b43c336acfc9e0aee3a6ca5579205533f3cce25a8
font_02_sfnt_off0001580d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1580D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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