Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadd4c23b0c39350…

MALICIOUS

PDF

68.3 KB Created: 2021-01-17 08:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 9e117e6fe731d5916d9d5ee8ac200505 SHA-1: 0d2a10326c59c0ddaeec180e6fa0e97a9a2bc128 SHA-256: cadd4c23b0c39350008c500d65c9e3fb6e7592518ebc355b29815f568e945ed0
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

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
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=fire+in+the+hole+elmore+leonard+pdf In PDF document text
    • https://site-1174439.mozfiles.com/files/1174439/bleomycin_for_microcystic_lymphatic_malformation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380695/normal_5ffcb3334c318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_5fa8b5b781e6e.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/VySphiR/rxsaver_prescription_drug_discounts_coupons.pdfIn PDF document text
    • https://site-1255928.mozfiles.com/files/1255928/bevel_trimmer_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/haQicXG/happy_wheels_update_2020.pdfIn PDF document text
    • https://site-1174423.mozfiles.com/files/1174423/kukosoworubelevodefum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_5fbe29379e556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fd67102b34f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fe727cd594b3.pdfIn PDF document text
    • https://site-1177077.mozfiles.com/files/1177077/ibps_guide_weekly_current_affairs_november_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411273/normal_60011b81b3f60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/weather_report_for_gaylord_mi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 5060 bytes
SHA-256: 23ffb11a8d6347aff0b65cd4243160fb0006fea99702b4d0f790dc029a855c04
font_01_sfnt_off0000e096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE096 10672 bytes
SHA-256: df4645a918f766f44bd5eb428222b7efd6a8a5fe9aa82a6f57606fc65b7cc2dc

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