Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74da9afc8877406…

MALICIOUS

PDF

78.0 KB Created: 2021-03-02 13:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d5b2c3bcff2929768662847553ed0048 SHA-1: 42854c3a97127ea2247b6de0e5ad714ece35cc45 SHA-256: e74da9afc8877406c9240eabcae0f5206a5e0896dee1dab01ae8bf8175f29dd0
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The heuristic 'SE_SECURITY_BYPASS' indicates the document may instruct users to disable security software, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://maypoin.ru/123?utm_term=is+there+still+nationalism+today PDF link annotation
    • http://siwivelijutore.medianewsonline.com/yamaha_rx-v673_manual.pdfIn PDF document text
    • https://bebedukiraf.weebly.com/uploads/1/3/4/8/134885496/fe8a5c.pdfIn PDF document text
    • http://hdsamara.ru/a1275_transistor_datasheetavjce.pdfIn PDF document text
    • https://pawikewam.weebly.com/uploads/1/3/4/4/134445239/9965575.pdfIn PDF document text
    • http://koolmaxt.online/69124937694qor6k.pdfIn PDF document text
    • https://luwanolukurodo.weebly.com/uploads/1/3/5/3/135397368/dee2757f.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/9864307.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/iPjefhf/draughts_online_app.pdfIn PDF document text
    • http://pixell.store/62861157260m6oj9.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/44333459966.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/7779871526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5ffa89dceff4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376878/normal_5fe0889c61c56.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/10738913436.pdfIn PDF document text
    • http://com-signto6.xyz/324031685424ow92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fdc95cd25a8f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimobepetokonud.myartsonline.com/servant_leadership_greenleaf.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/clasificacin_de_los_nmeros_reales_ejercicios.pdfIn PDF document text
    • http://karelovaluz.epizy.com/93685746736.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_off0000f370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF370 5104 bytes
SHA-256: 7455e49b3c4936f43592ad123ecbd35a11a2edefb4892b6600f453ac27a85af7
font_01_sfnt_off000104a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 11468 bytes
SHA-256: 246183abef281215f79a443d6a7f8f06c765ada1f7d7314ae6143f9c3e5962e6

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