Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbe37f3afdca113…

MALICIOUS

PDF

75.2 KB Created: 2020-12-31 01:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a1eb7ac47fa8f96e84207605b3fdbbad SHA-1: b825fb45b41df9af8e54fe5e05c817dc5315f3c7 SHA-256: 3bbe37f3afdca11317275a84ec5e5286362235222c9c4587c5c96a3e2814845a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a furnace installation manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=american+standard+freedom+80+furnace+installation+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f92ed6b6ea44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372105/normal_5fdf80f2da70f.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/dbRnhdT/5755275822.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/nibgeij/walmart_moneygram_online_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f93d6c45badb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479675/normal_5fd84d0317a0f.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/76026591-35d3-4d5a-8ab3-95de77ffe7e6/13849088035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df07b29d-f7f0-438a-b0c6-2c05a12dcde2/sorel_caribou_mens_winter_boots.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d238e008-9e9c-457b-8f78-8ff562f73c08/vtech_cordless_phone_battery_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d429550-b553-4972-9564-eae0868883f8/differences_between_constitutional_and_nonconstitutional_governments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdd75c32-045f-4a19-b688-da5fa9b6aa76/nujeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c88f4925-f1a8-4746-a399-85fd7988a8ce/xujenozutoluk.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 1

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_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 5492 bytes
SHA-256: cbb2b0c322d786df5aaa003df55471ea985ca3aca0005ce1945d119ec41719c6
font_01_sfnt_off0000f6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 12004 bytes
SHA-256: e21d86d32e073b5cef441fc909a04469089e5897cb9c0f397846c7cb1cf7cb48

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