Malicious PDF — malware analysis report

Static analysis result for SHA-256 f251fd5e7a643ba5…

MALICIOUS

PDF

79.6 KB Created: 2021-03-17 11:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5ff1be3081c8d84b956d8bb48d8d5b85 SHA-1: 740cd7b44bce124782f1bbeddc514066937d404c SHA-256: f251fd5e7a643ba501149e5d6ef63e033a0962638a6ab24493070cf82c0dfb26
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9996

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 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://resalured.ru/123?utm_term=anuncios+facebook+formatos PDF link annotation
    • https://falaxejuwutop.weebly.com/uploads/1/3/2/6/132681153/6632378.pdfIn PDF document text
    • http://koduxipib.iblogger.org/fugumup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455890/normal_5fea1d5608388.pdfIn PDF document text
    • http://saramigubenegit.22web.org/19250576140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fca8f5f5c72e.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/dihhbia/descargar_wondershare_mirrorgo_apk.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/1bbdec.pdfIn PDF document text
    • http://fuzefimovogavi.22web.org/comment_faire_pour_avoir_un_ventre_plat.pdfIn PDF document text
    • https://cdn.sqhk.co/rizitewav/uib9Mjg/exchange_vanilla_gift_card_for_bitcoin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6031fc49a1128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_5fd14f80e9e44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487623/normal_5fe275f569914.pdfIn PDF document text
    • https://xulomonixibeneg.weebly.com/uploads/1/3/1/4/131455416/4754204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fe844892f85c.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuzasana/cgcgcjW/sokazori.pdfIn PDF document text
    • https://didosetugub.weebly.com/uploads/1/3/1/6/131606008/46ce951895179a5.pdfIn PDF document text
    • https://fuvenaxumegiga.weebly.com/uploads/1/3/3/9/133999500/107763.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/hhfssge/45137721185.pdfIn PDF document text
    • https://tasapeneme.weebly.com/uploads/1/3/5/3/135308717/nipexemofudokepegid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojunefasuxew.rf.gd/atomic_structure_chemistry_ncert.pdfIn PDF document text
    • http://fatofejeripise.rf.gd/gadisuzadev.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_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 5188 bytes
SHA-256: 8c66f3513f946f57d4bb68b98f5e2d7d50f255e83dc20db60fdf9dadc44ea4f6
font_01_sfnt_off000109ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 11552 bytes
SHA-256: 8764b90c53db83cdc91e71e3d28dde1d6fc2625aeb21abfc5c67c3417ab699c4

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