Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2b3b9410a47aed…

MALICIOUS

PDF

63.0 KB Created: 2021-01-22 07:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f7347d87899488137f7cfcda3da6f24b SHA-1: 316c61315bff9d62d9f3fd7e7f64746165f80201 SHA-256: cf2b3b9410a47aede37db84dbdb938bd19f8a1b210b6116c83e419b5344529ee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to multiple external hosts, with one prominent URL being https://traffking.ru/123. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=red+banana+tree+indoors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fe8838c3f0e0.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/nalufubobu_fatap_batuzug.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/ggEhbhj/flash_alerts_2_pro_crack.pdfIn PDF document text
    • http://zupinuxuxodu.iblogger.org/74100095467.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/13hqchd/sonny_bono_death_helmet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392474/normal_5fd7eeec5ffe6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408599/normal_5fed1ba29ad95.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/pihgcje/juniwejavogam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485309/normal_5ffbd7f4d72c0.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/pokorevalaxex/ffxiv_conjurer_hunting_log_guide.pdfIn PDF document text
    • http://nadurajamewe.epizy.com/missguided_stores_in_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/uniform_random_variable_cdf.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/rexudopizajujur.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_off0000bce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE4 4932 bytes
SHA-256: 45e221da860ad98075cc0dd4404bbc329d61967241fa76a4511b90a8e75a38f6
font_01_sfnt_off0000cdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB6 10028 bytes
SHA-256: fb07fc77e148995066b4d0aa70573865e8445dfe3e27bf8150726d90fe8074ce

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