Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2e3adcf21b6049…

MALICIOUS

PDF

62.2 KB Created: 2020-12-21 17:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0e0f251e13ce271904e663f308e02964 SHA-1: d36af9cee1fd4eb79ee5f7a2803a36eb3774874a SHA-256: 4c2e3adcf21b60496a14a0f9ff54206bea0158793d51b5620782070752bb5ba0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF_SEO_UTM_REDIRECTOR_LINK heuristic suggests a phishing lure, likely disguised as a free download. The embedded URL `https://trafffi.ru/strik?utm_term=need+for+speed+no+limits+apkpure` serves as the primary indicator of compromise, acting as a redirector to the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/strik?utm_term=need+for+speed+no+limits+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475730/normal_5fad4cfd82f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_5fdc459e6c03a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5fa52c591c3af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fc5a954e4ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5fb811944bafa.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/0431d9c7-b0d7-4e9f-9d9f-7212ca574bd9/pisadodewixanowaxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c76963-3420-4a99-b0a2-38c3808758cc/rivogajiwugital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcaa4145-e4c9-4a17-bc14-be62d32bdebf/83149992976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af818a6-eda2-469f-9593-4b201560a046/56921717259.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/national_league_of_nursing_competencies.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe06114f98375720a726ea/1606288913476/74332775546.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 2

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_off0000b644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB644 5220 bytes
SHA-256: ffc1bae152afd91278ebc3e9d91a5f8935a4de2751021cb7830cdeb6bda840e3
font_01_sfnt_off0000c7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 11240 bytes
SHA-256: 07807f3556cd02bf7ad41cf07c368bc584dc37c009c82d9209f87f662559eba7

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