Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9dda8d7979a46e…

MALICIOUS

PDF

76.1 KB Created: 2021-04-01 23:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff7275393be3734c714189b915f33324 SHA-1: 9738939b2efaaf6c36db39168da70504ef4d24c1 SHA-256: ce9dda8d7979a46e50e670c1941a3a32892a198a068ca3ea2a21b9183fc5bda7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged by heuristics as a link farm and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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://bologen.ru/strik?utm_term=the+power+of+persistent+prayer+pdf
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/6acdc93a68913.pdf
    • https://static.s123-cdn-static.com/uploads/4401697/normal_5fee9fa71b47c.pdf
    • https://pezibufanijazox.weebly.com/uploads/1/3/4/6/134639202/bb0942075c.pdf
    • https://cdn.sqhk.co/zutomina/Rifjiib/sotusapijifozad.pdf
    • https://cdn.sqhk.co/nasubivapu/giHiigf/allow_duet_and_react_meaning_in_urdu.pdf
    • https://cdn-cms.f-static.net/uploads/4416322/normal_604acb529d9fe.pdf
    • https://tekolukab.weebly.com/uploads/1/3/4/8/134853049/totopupamubunag.pdf
    • https://cdn-cms.f-static.net/uploads/4460460/normal_60342684a61a1.pdf
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/03eaa338f6.pdf
    • https://cdn.sqhk.co/vatomepipiw/aifX8ha/goxedefupubilurorofo.pdf
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/5354682.pdf
    • http://wimuzawoxi.getenjoyment.net/bent_rule.pdf
    • http://xapowuxif.mywebcommunity.org/72459781841.pdf
    • https://cdn-cms.f-static.net/uploads/4417139/normal_600bca5149ca5.pdf
    • https://cdn.sqhk.co/jebavimot/jidGMhg/zegizuwofewim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/07e14ea0-7b45-43a9-b7a1-b6e515ebc893/20072671304.pdf
    • https://uploads.strikinglycdn.com/files/0198640c-ac97-4cb9-b459-f638aeaf0ae2/factoring_quadratic_trinomials_worksheet_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/9a43f604-af20-41bc-a644-6519e589033e/the_hunger_games_movie_download_in_hindi_300mb.pdf
    • http://likutolejit.onlinewebshop.net/cfa_level_1_salary_uk.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_off0000eba5.bin
797cb3af864f5f6ea9ce9f9d124e051410a160fb6fbaf1280224b5fb4ffaf12f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 5240 bytes
font_01_sfnt_off0000fd8a.bin
e506e54cdec160e3604d0a899e46a5698ab117fa6de8320e8f828b7543d522e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8A 10628 bytes

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