Malicious PDF — malware analysis report

Static analysis result for SHA-256 550911f0c390cd1d…

MALICIOUS

PDF

69.1 KB Created: 2020-12-26 13:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ec4222b21a054dd065485d1b4742644c SHA-1: 21d0da0523f110ab88e7c06f3908e17ba2040af1 SHA-256: 550911f0c390cd1d741e4d9356826eb11112b927cccd00f79d529f4654a77ef7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, indicates it is masquerading as a 'Microsoft word form template' to deceive users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=microsoft+word+form+template PDF link annotation
    • https://cdn.sqhk.co/dakagugi/ggHhdbp/mewubosanekiwurapo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5fdfc37f48443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_5fab8aedc0b43.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/kavoroba_tolukivamedida_poror_sadujofo.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/aib5iba/fireboy_watergirl_forest_temple_primary_games.pdfIn PDF document text
    • https://bizavurodetilu.weebly.com/uploads/1/3/4/3/134391156/varazozax_xuvogibenaw_vofubovutipupe_vurega.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5fcf0b7a10c4d.pdfIn PDF document text
    • https://mijolepeworid.weebly.com/uploads/1/3/5/3/135394353/dovepinit.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/jokixigaxajax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_5f92e1141b090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_5fcdc27ad6680.pdfIn PDF document text
    • https://cdn.sqhk.co/wewidipo/42HIPje/25402379816.pdfIn PDF document text
    • https://cdn.sqhk.co/dejenuluzew/bhhjgja/binofojezivunelorasis.pdfIn PDF document text
    • https://momiweporav.weebly.com/uploads/1/3/4/7/134745900/mevawigavurob_lalekaguw_bovodefurezajeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/air_bearing_download.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/govitabitegi.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_off0000d1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EA 5400 bytes
SHA-256: e2b3bb35e7651c9b0223a36d7b30200a42a8e10c0dc7fc91ea4900285524f5ff
font_01_sfnt_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 10456 bytes
SHA-256: 1020e06743dc112f58dbba0e5103d7e30efe8881dca3c0c1ee4c3091a452342b

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