Malicious PDF — malware analysis report

Static analysis result for SHA-256 5990cb402a5e34fa…

MALICIOUS

PDF

71.9 KB Created: 2020-11-25 11:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 267e81d9e690fd9ea81ae42b5937492c SHA-1: 127d949a69094fa3b9ffddded61bcaa30abe9304 SHA-256: 5990cb402a5e34fa336b8016963c4abca081b326ba1b8b381343acfcee2097ce
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9995

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://trafftec.ru/strik?utm_term=iwc+pilot+watch+top+gun PDF link annotation
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/zutugofuz-mafijik-fakofilisita.pdfIn PDF document text
    • https://joduzowulidu.weebly.com/uploads/1/3/4/4/134435513/jirekalona_wulozava.pdfIn PDF document text
    • https://pozuxopukemo.weebly.com/uploads/1/3/4/7/134705319/vuduzegobi-wojodazakune-vomonalesipusu-buxorixasub.pdfIn PDF document text
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/lejexaruj-nupil-kexurivalakur-memebagina.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/bipufus-sasunagadaw-bufefepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f91cfa864e19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_5fa71239d5687.pdfIn PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/buduxofupigolov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_5fa01a49b4e23.pdfIn PDF document text
    • https://kogavoduwesexup.weebly.com/uploads/1/3/4/6/134600755/548ba77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_5fada94b35127.pdfIn PDF document text
    • https://luretazolikaxu.weebly.com/uploads/1/3/4/5/134587875/gedawesot-nefuzaza-toxokadoj-galeki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B1 2952 bytes
SHA-256: 18f3dad90f0b8a749557125039a501166b605b51d41492c5c2dfd7e147c8bf53
font_01_sfnt_off0000d140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 4712 bytes
SHA-256: 664dc142db910d82541dba04a3ac854d39deb8e6380bd545c48c1da102bd7d7e
font_02_sfnt_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 10360 bytes
SHA-256: 6b1da2487a714152685ee419c90a5e628b69605d005bc25e0139c5cfb1de9f8b
font_03_sfnt_off000104e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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