Malicious PDF — malware analysis report

Static analysis result for SHA-256 98af6b4085170106…

MALICIOUS

PDF

74.8 KB Created: 2021-03-02 04:04:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a74aa79a7b4754a54fca04a0fb8aa8b2 SHA-1: 4684c92a9be766f06c7c0faaa9a403d784524e7b SHA-256: 98af6b408517010657f500542c6e594b8736183444fda7e06e1111dcddf9b135
246 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous external links to various PDF files, likely for SEO manipulation or to host phishing lures. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates an attempt to impersonate a brand, likely leading to credential theft. The presence of multiple external URIs and a high ML classifier score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/5719a1efb.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://kuzutuzo.ru/award?keyword=gym+jones+workout+300 PDF link annotation
    • http://dokojusekorukuf.iblogger.org/equifax_data_breach_senate_report.pdfIn PDF document text
    • http://fuwefepor.iblogger.org/vusoduwirokatagewetu.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/5719a1efb.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/tuvekaditamamo.pdfIn PDF document text
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/7f504.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/nourishing_traditions_pregnancy_diet.pdfIn PDF document text
    • https://widajuzuno.weebly.com/uploads/1/3/1/6/131637349/4860215.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/lodulesuzagasi_xapedur_gupozoboleni_subisaniwujuxo.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/3515602.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/c1eeffa4.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/jolimexi_fegakel.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/can_flavored_condoms_cause_uti.pdfIn PDF document text
    • https://sasofisapen.weebly.com/uploads/1/3/4/5/134590640/5023949.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surifetopene.epizy.com/cisco_sg350x-_48p_manual.pdfIn PDF document text
    • http://bavutikoguvumit.rf.gd/asche_abar_shabor_full_movie_filmywap.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 5260 bytes
SHA-256: e0f4c81f120b99212c5abba2e82c4ec13d5ace8a504b1b73f849d8ed651c0b74
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 10476 bytes
SHA-256: a6e3223fa93c7cc18d48660701b4f7c5fa293bed574d9bbcd029988ca69a730b

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