Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea9e360ac9ccc84…

MALICIOUS

PDF

76.9 KB Created: 2021-03-23 03:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 252409abe72fd112fa8d300fb7f4ce83 SHA-1: 22b3b81724cd7a136209a592e623616e47ea0b53 SHA-256: 7ea9e360ac9ccc84346833ed7dec7e5f44e5dc7e081a983eafd8e45bab9fc16e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content or redirect to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=mobile+call+gsm+alarm+system+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447877/normal_6019a2077f8f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_600ee9b76ddb1.pdfIn PDF document text
    • http://topikufovumedar.iblogger.org/asteroide_definicion.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/35054652e2a.pdfIn PDF document text
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/rovotibaxet.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/6a5206994fadf09.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/pevuvuko.pdfIn PDF document text
    • https://buzokiki.weebly.com/uploads/1/3/4/8/134853803/3247856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fd05eab2fba0.pdfIn PDF document text
    • http://agent-ritual495.online/dell_latitude_e6410_drivers_windows_7_64-bit_free_downloadob6iz.pdfIn PDF document text
    • https://dokivubugu.weebly.com/uploads/1/3/4/6/134688884/wiwipizefe.pdfIn PDF document text
    • https://funogefoxareso.weebly.com/uploads/1/3/4/0/134041001/7a4d0e291.pdfIn PDF document text
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/waxiridegoginezimoxa.pdfIn PDF document text
    • http://wiinorama.website/how_to_grow_tomatoes_in_florida_in_potsel9bd.pdfIn PDF document text
    • http://1xbet-registr.site/cognitive_bias_codex_cheat_sheet7gbw2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_d4b6463450e3406c95904858be025666.pdf?index=trueIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_2c16947a57854d36acd7fedb5b8a7ac5.pdf?index=trueIn PDF document text
    • http://suvoxezol.rf.gd/4308367766.pdfIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_dd8ee9a8a5b042948c124542c91634ea.pdf?index=trueIn PDF document text
    • http://memunameno.epizy.com/94572164051.pdfIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_1919217f44eb40868fcd97e11ddd8881.pdf?index=trueIn PDF document text
    • http://duzivuzox.epizy.com/juseruwefatoziferilivet.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_f0da05878f5d415a8b1837a3a5bd3945.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 5364 bytes
SHA-256: 1a050215b4c8a76f7ca7603409104751f6e7343f1166ac748dfa19b2e2cbfa3e
font_01_sfnt_off0000fdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEC 11732 bytes
SHA-256: 7ea04d4999f4d41c80f83d1d7021e1ebd14df1caf7a1dc57f18c9e5817583f33