Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c8e1a34a206b9f6…

MALICIOUS

PDF

80.5 KB Created: 2021-06-04 01:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 769977d91e1a4928a4743df18c8c1f21 SHA-1: c1c93ecfc6f1a46751e06c371d077e82c108e51a SHA-256: 0c8e1a34a206b9f66b202306863ce1ea0727aa989899e7bb6f441a80ba28c52e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/123?utm_term=galvanized+sheet+hs+code PDF link annotation
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/9bddde4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_601de66c2925b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371497/normal_60043a36587b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5fcc84fe9293b.pdfIn PDF document text
    • https://zigetavut.weebly.com/uploads/1/3/0/8/130814179/6373779.pdfIn PDF document text
    • https://ruregojuze.weebly.com/uploads/1/3/2/8/132814589/fimanigud.pdfIn PDF document text
    • https://monoxoni.weebly.com/uploads/1/3/0/7/130738852/vodexasixa.pdfIn PDF document text
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/5e842e44073aa04.pdfIn PDF document text
    • https://wulakajif.weebly.com/uploads/1/3/2/7/132740593/6661067.pdfIn PDF document text
    • https://peminikagi.weebly.com/uploads/1/3/1/8/131856713/dupiveg-gafetawo.pdfIn PDF document text
    • https://gedibaforajipet.weebly.com/uploads/1/3/0/8/130874683/vozakewewexodaga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475716/normal_5fe2e3dda2b24.pdfIn PDF document text
    • https://rejawezegevipi.weebly.com/uploads/1/3/1/4/131437848/ebab286b263e0.pdfIn PDF document text
    • https://lavazelowima.weebly.com/uploads/1/3/4/3/134316744/ladasafevediza_texugaf_borotoxobulu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144509601/biponib.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144434568/warhammer_40k_inquisitor_martyr_crusader_melee_build_2019.pdfIn PDF document text
    • http://savavaze.pbworks.com/f/xawazid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b85545-2a05-4fac-8d92-f525f008ea75/what_size_staples_for_heavy_duty_staple_gun.pdfIn PDF document text
    • http://wotasaful.pbworks.com/f/83137869982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35a64b2-177e-4d7f-b192-772b46841d0d/rn_covid_testing_site_jobs_miami_fl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc050a57-80f2-45d1-ae10-f867ff8746cd/running_on_empty_dr_jonice_webb.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/radio_script_template_ks2.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_off0000fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 5072 bytes
SHA-256: 1171da28d9e385d7704d537f72873185a99a9f81757b6dadce9dcbc98a7be81e
font_01_sfnt_off00010b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B70 11748 bytes
SHA-256: 402fc0b4696e5c6ea4fc09cdf56ed1e4efd294b342604c44b48d3a8b4a38309b