Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a53bd628a6b2b5f…

MALICIOUS

PDF

74.0 KB Created: 2021-05-18 19:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c84b77396e1a4b716914fe46a6432930 SHA-1: 246f6b1675eb197fda51157e4dfba8acd93ff28b SHA-256: 5a53bd628a6b2b5f7d9d1b85f56d1f32d6535730d359e82a4b6382d5e5cfa749
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is part of a link farm hosted on disposable domains, designed to redirect users. The embedded URL points to a game speed booster, a common lure for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=game+speed+booster+apk
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/c4d677.pdf
    • http://jakivuxevova.22web.org/ethnographic_approach_to_research.pdf
    • https://cdn-cms.f-static.net/uploads/4393044/normal_606a22e5697af.pdf
    • http://lefavapexusa.iblogger.org/architects_salary_guide_uk.pdf
    • https://cdn-cms.f-static.net/uploads/4420599/normal_602366beec7c6.pdf
    • http://kaxidabifibag.iblogger.org/18122975388.pdf
    • http://kebuluwe.iblogger.org/rawofizugogo.pdf
    • http://fedemofutig.22web.org/friedrich_nietzsche_philosophical_ideas.pdf
    • https://static.s123-cdn-static.com/uploads/4365547/normal_5fff444930893.pdf
    • https://tujewadis.weebly.com/uploads/1/3/5/3/135312055/3198834.pdf
    • https://static.s123-cdn-static.com/uploads/4403271/normal_5fc7e15098a04.pdf
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60602de35ab46.pdf
    • https://static.s123-cdn-static.com/uploads/4460247/normal_6000b2888b7df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nugifola.rf.gd/98078583100.pdf
    • http://moraruvotu.epizy.com/xenagubusibavusezib.pdf
    • http://zarilapaserit.rf.gd/biryani_recipe_malayalam.pdf
    • http://tuzotulerijenej.rf.gd/15594515966.pdf
    • http://sidorigix.rf.gd/el_anarquismo_frente_al_derecho.pdf
    • http://kutusejanofoxem.epizy.com/vobidukowijetidoguvumero.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e452.bin
36d048078daa7935fcc3d06c022a87faace6e75deb3a13f1a9532123bf1e40d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE452 5308 bytes
font_01_sfnt_off0000f649.bin
6be9122af78e52f6c8ca77c472754e417c284710efc0f0560b75562d8c6853ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 10724 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.