Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba614436f80e7366…

MALICIOUS

PDF

65.2 KB Created: 2021-03-27 11:05:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8dd33577ac447802f54992856eedc957 SHA-1: 24b1d3f8d871b2c9cc6824d2bcf4995ed09d18d7 SHA-256: ba614436f80e7366ff6ba8bfc471e2828445a70f87b9cb66fc5c990ab459cac2
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or SEO-abused external websites, rather than delivering a direct exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8273

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 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
  • 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/award?keyword=advanced+excel+2020+formulas+tutorial+pdf PDF link annotation
    • https://kakerenu.weebly.com/uploads/1/3/1/0/131071145/0bd2f187db37728.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/ejcjeHh/whitman_coin_collection_holders.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/pxjgxge/exos_heroes_wiki_jp.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/5gc3ifQ/download_smashing_rush_mod_apk_versi_terbaru.pdfIn PDF document text
    • https://gawozigojuvapa.weebly.com/uploads/1/3/4/8/134896601/aa35f0b2a755d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452626/normal_5fcacb713569c.pdfIn PDF document text
    • http://gerawat.22web.org/57481289586.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/Dgjiejd/konejadijanudal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460231/normal_5fe4e20a03481.pdfIn PDF document text
    • https://toriradusug.weebly.com/uploads/1/3/4/7/134744904/gunebulusivodab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499651/normal_6003edc832fa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451941/normal_5ff0b8ee687b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fce0bf9c38d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_6008fae1bba23.pdfIn PDF document text
    • https://cdn.sqhk.co/gowexenopa/kCFEb61/cerebral_palsy_adalah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391319/normal_5ff4c67299a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_600c351e4f094.pdfIn PDF document text
    • https://nedugapepo.weebly.com/uploads/1/3/4/2/134265444/9377846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497688/normal_5fe8fda9c3898.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mubomapobe.epizy.com/sociological_research_proposal_format.pdfIn PDF document text
    • http://gulazefedonijo.epizy.com/official_announcement_template.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 5692 bytes
SHA-256: 6b252e061d2c650883243839994c8026c40dccad6aeb01f6d3c5bf6239fb3596

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