Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b79842e9ff08ea9…

MALICIOUS

PDF

83.0 KB Created: 2021-03-05 17:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c0c59f60d36cdaf3565189208e1dc280 SHA-1: f12a3e50ef9da75d0fec7ceda5f7b611b4adcdaa SHA-256: 0b79842e9ff08ea9a3c5ca894c63ad06375fb9b6cee7b9e5dc2b89d89677cbbd
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to various domains, many of which are hosted on disposable or dynamic DNS services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://golowaki.ru/wix?keyword=garage+parking+guide+ball PDF link annotation
    • https://cdn.sqhk.co/bepifopid/HxgcUcu/digital_marketing_manager_job_description_hubspot.pdfIn PDF document text
    • https://sinegaxoxu.weebly.com/uploads/1/3/4/4/134462527/4139557e76.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/jahbNFu/cats_crash_arena_turbo_stars_hack_appvn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460042/normal_5fdea2a59f9da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_6033c282ef2dc.pdfIn PDF document text
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/wezokuleb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413465/normal_6001fe3b6f87e.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/jgjahg3/86256978468.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/logitech_z323_2.1_speaker_system_with_subwoofer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457857/normal_5fcc57e37ee7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457014/normal_5fd7b4af8344f.pdfIn PDF document text
    • https://fesalepexixid.weebly.com/uploads/1/3/4/6/134660072/luvafikesexovisumi.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/what_to_do_if_you_have_bad_handwriting.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461250/normal_5fc7267f41637.pdfIn PDF document text
    • https://cdn.sqhk.co/kixituvelil/ySgegf9/tavoxenogederusar.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/fXgcjf3/the_vikings_mod_apk_android_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454561/normal_5fc584d19f92e.pdfIn PDF document text
    • https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/3670942.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/sony_hdr-cx160_as_webcam.pdfIn PDF document text
    • https://jurefuzosapob.weebly.com/uploads/1/3/4/9/134901670/wexidesapezok_wujamoxaxoxuxex_fezoduzeduned.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lufopudizomuv.atwebpages.com/what_intermolecular_forces_are_present_in_propane.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_off0001084b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 5184 bytes
SHA-256: 2c3caeb2743913afa5235fddd002cc0145cb0d480b815bce86fa9b47f4c415be
font_01_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 10676 bytes
SHA-256: 09d5fab74fb596f7169dd201ac0b9868934ac0780ac5c85adc36e6eec82d6b90