Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bf77758021649b…

MALICIOUS

PDF

90.0 KB Created: 2021-03-03 01:29:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b8907da2a2da0010da09b97ef8e11294 SHA-1: bc66a727666f44cd2d81559591f5d84cb5bcc7ea SHA-256: 94bf77758021649b52993b1264ef3b016666dc63f33f0192b3ea890630edac5b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on directing users to `https://soxebez.ru/strik`. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload via the linked URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=nfpa+1001+company+training PDF link annotation
    • http://radogomi.mygamesonline.org/88892217670.pdfIn PDF document text
    • https://lovalizivida.weebly.com/uploads/1/3/5/9/135990258/gevisobuzoke-gokataw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380876/normal_5fd1ba3fedf01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_6018d46d46063.pdfIn PDF document text
    • http://klossheff.xyz/download_game_biz_builder_delux_sp_mod_apkpih24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_5fd5f251304e4.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/54795485967.pdfIn PDF document text
    • https://cdn.sqhk.co/gofejenizew/asLhfib/facebook_lite_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/gejbhjH/best_digestive_enzymes_for_ibs_bloating.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/the_beginning_of_everything_film.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/wimoziwawatani.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/30527704222.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/1c61924ab4.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/fatosefufesezosuli.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/5jg0gjI/hourly_weather_forecast_for_tomorrow_morning.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://kavibajegis.onlinewebshop.net/30558223236.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/totikoxumalavonazenumexaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11607 5060 bytes
SHA-256: 8ddafc47037404db0734c73eb85113bf4949dabcd50e1358d9aa7934636ccc2a
font_01_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 11080 bytes
SHA-256: aaf819aa7e56f2d26d6ca6f2a45f84fa7cd4c94ff7c1e14ae2d9584dd359a8ab
font_02_sfnt_off00014cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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