Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cc7eb85831ce48…

MALICIOUS

PDF

75.8 KB Created: 2021-03-26 19:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7aeb58762ef624a4667d178ba92bcf71 SHA-1: 7f9f07aa53fffafb2c96f1fe12e5c697e9601e8b SHA-256: f3cc7eb85831ce48e0fd1c27bbb7f5c9f656f2e6db271276edd2c962094d2d1f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/award?keyword=c.+v+pattern+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458623/normal_60447380b9e49.pdfIn PDF document text
    • https://wixumiwob.weebly.com/uploads/1/3/0/7/130776296/fajawedepaforegeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476274/normal_60510e98e8609.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/rawovezodotipameragemive.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/Ozgf2Cl/mutant_beasts_mod_9minecraft.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500669/normal_5ff04c6b43c2d.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/archimate_3_certification_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460048/normal_5fe8d4ffce27e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380082/normal_5fef38352192f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465694/normal_60098b24e3f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_602070d1554c7.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/6120458.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/lozufojaxuro.pdfIn PDF document text
    • http://xifutipixa.mywebcommunity.org/golegosalala.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/how_to_edit_your_book_yourself.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/hgeQgYd/learn_android_programming_step_by_step_free_online.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/el_juego_de_los_cuentos_jorge_bucay.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/efDhaia/kevavolowelelenuler.pdfIn PDF document text
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/1635ca.pdfIn PDF document text
    • https://cdn.sqhk.co/nawovoso/2PNhidm/96621711214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_600bb83d7142b.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/software_testing_services_ltd.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/wubukibupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepofif.onlinewebshop.net/xukunajula.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/38432924726.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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 4824 bytes
SHA-256: 74042c4bb60144e2b48009a9aaaae58066c2e476f60e1e524d5a16aa34e707f7
font_01_sfnt_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 10320 bytes
SHA-256: 7c5dbc8269717b4d513787eb8271a1cfd4019964e257ae3ab571735faa838baa

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