Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbe9421848c2d38…

MALICIOUS

PDF

74.9 KB Created: 2021-05-31 19:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05e805af8f20a306e9c68c509989a9ae SHA-1: f5d6ae75596e03317cc9ff876ea57ac0ebba9282 SHA-256: 0fbe9421848c2d383787666ec4f46b7140c421f9cf72064964929be56d386857
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged for brand-impersonation credential phishing. It contains a large number of external links, many pointing to disposable hosting, designed to obscure the ultimate destination. One critical finding is a link to a redirector leading to a PDF hosted on weebly.com, which is part of a credential phishing lure for Netflix. The document's structure and embedded links suggest it's part of a link farm designed to distribute phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rajafobumexa.weebly.com/uploads/1/3/4/1/134109296/zigova.pdf.
  • 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://synerhu.ru/pbw?utm_term=how+to+control+vizio+soundbar+with+samsung+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406464/normal_603f4758bf22a.pdfIn PDF document text
    • https://rajafobumexa.weebly.com/uploads/1/3/4/1/134109296/zigova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_602b4f7eb931b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fed3f791ad09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497638/normal_60690b34bb619.pdfIn PDF document text
    • https://gofabede.weebly.com/uploads/1/3/1/4/131453232/wiketegog-vojilekodawodag-vulixewomufoxis-nezesoleneluwu.pdfIn PDF document text
    • https://jaragamonobuwuf.weebly.com/uploads/1/3/5/3/135346236/sopaxetedin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467926/normal_6003de64b9924.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/89ac6b3ff4fc65.pdfIn PDF document text
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/tebutimepogusikupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144411435/human_genetics_concepts_and_applications_12th_edition_by_ricki_lewis.pdfIn PDF document text
    • http://natizasex.pbworks.com/w/file/fetch/144411627/81675001342.pdfIn PDF document text
    • http://gulisapil.pbworks.com/f/tekken_5_psp_romsmania_usa.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/how_to_refill_a_stanley_staple_gun.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144415191/fuxabekosoli.pdfIn PDF document text
    • http://neruwuk.pbworks.com/f/romomudokederoweg.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_off0000e625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 5656 bytes
SHA-256: f6b594199ab8f2b4c4f3af0fefedd6fceff21524eae62e27fcabee5f2a7a13b4
font_01_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 10868 bytes
SHA-256: a52680ba3f09a5c9e175bf87b5a01da9373f8bc7c73af4f5d5c3763ca50a00cd