Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c4c8399a50d205…

MALICIOUS

PDF

71.6 KB Created: 2021-02-20 18:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3061b8601d3c70290d2d0ebd2e8ea49a SHA-1: 4eb0fd7aafbc7c947e02ae0783908a9cb744fe78 SHA-256: e0c4c8399a50d205d45327817ec9dea32f34439be9b5c58108c7570d440cef09
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL pointing to a keyword-rich search query. This suggests an attempt to manipulate search engine rankings or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=el+cartel+delos+sapos+personajes+reales PDF link annotation
    • http://vehicleusains.com/749489694368bgyg.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/gAnhdBe/60128293381.pdfIn PDF document text
    • https://zivexipoter.weebly.com/uploads/1/3/1/4/131483036/vukolo.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/jgjjDib/piano_magic_tiles_pop_music_2_mod.pdfIn PDF document text
    • http://prognoz-football.club/17788301864id891.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/0040edd.pdfIn PDF document text
    • https://duroxogudoli.weebly.com/uploads/1/3/4/3/134318703/6015319.pdfIn PDF document text
    • http://busurman.space/adidas_logo_historykzrcl.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/masidoxalojej.pdfIn PDF document text
    • https://rofozewoguse.weebly.com/uploads/1/3/1/3/131384025/dutuvaparavam.pdfIn PDF document text
    • https://kevotimobamos.weebly.com/uploads/1/3/1/6/131636762/4974462.pdfIn PDF document text
    • http://tendernes.ru/nikon_coolpix_s9700_chargingsn111.pdfIn PDF document text
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/1eaae393.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/lolijexejomak/4243849428.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/29484011555.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/kirirobekitizinumo.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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 5100 bytes
SHA-256: ebfd66fb8cb4ca02129f9febeea33abbc78db45bec9c93998a5299a746c19296
font_01_sfnt_off0000ec8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 11000 bytes
SHA-256: 9cffe2c7114c9e7915afb4fb854513a44e5dd79cfd32e6e7d7b48bad7cc86f9c

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