Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c86eadfe20a1bae…

MALICIOUS

PDF

73.2 KB Created: 2021-04-07 15:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6be1c538c983c2427d7c18a29a23c3a9 SHA-1: cc963e083ea8ca965259eae24693e09ad0b3362f SHA-256: 3c86eadfe20a1baeaf2559a533de0f62f47e31f21013e31653ea5c14d394205d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or redirecting users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

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://mezovuduw.ru/strik?utm_term=what+kind+of+milkshakes+do+sonic+have PDF link annotation
    • https://cdn.sqhk.co/nonuripot/KgeWoje/wow_video_call.pdfIn PDF document text
    • http://nickned.me/764281926529wkmh.pdfIn PDF document text
    • https://vizepojazitebag.weebly.com/uploads/1/3/4/1/134108988/ac47cbf.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/nonufugir.pdfIn PDF document text
    • https://kesudidudoj.weebly.com/uploads/1/3/4/4/134477594/malodamoxefax_setibawo_suwulo_dixanif.pdfIn PDF document text
    • https://cdn.sqhk.co/pepegizeso/0ibjFJu/53331901773.pdfIn PDF document text
    • https://pumelagu.weebly.com/uploads/1/3/2/8/132814433/junowidoni_jepeviz_dogil_viwojolavewob.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/wizolugomikonaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455672/normal_6006f127a3c9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_60692778169b4.pdfIn PDF document text
    • http://limecash.xyz/bukiteji1sldu.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/jukodug-xuwoxur-zukixaxanef-nirelamebolin.pdfIn PDF document text
    • https://bazeliwelari.weebly.com/uploads/1/3/1/8/131857734/39c5b2f75a04f5b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ea6302-d20c-4ae4-85f0-b308fa90422b/44022674392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff2b7fc-9dff-4032-9c4a-ac4e10e493ec/viking_built_in_refrigerator_prices.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_off0000e01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01C 5304 bytes
SHA-256: ddc1c506b69878150af84f3bd459f48b55a00a0e88cfd99106f8616e0327caf4
font_01_sfnt_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 11260 bytes
SHA-256: 3363d45a9776afa5d8fa33c8cc32e35adcdad5da45a96279caf92d87b3fe15c5

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