Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6a621d444505a9…

MALICIOUS

PDF

73.8 KB Created: 2020-12-30 06:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 64986a2ae8696478c4aa43c1a7e3d163 SHA-1: 1d3f3eb690f008eb928a744478c4fb45f3fab5a2 SHA-256: de6a621d444505a99f225ba23c76750f3415aff95136d1cfef60c01393d8524e
194 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 known malicious infrastructure, specifically identified as a redirector for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to traffic crash reports, suggesting a lure to trick users into clicking the malicious link.

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
  • 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.
  • 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.
  • 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/strik?utm_term=online+traffic+crash+reports+illinois In PDF document text
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5feb4dfc617d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fdb3f754f5b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_5fc00547c19f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451954/normal_5fc9873691774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5f9dcfd29d481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459466/normal_5fe5f03dc4393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_5fb55fbc6ac6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5fcf330cf3aa4.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/a537fb7f-8e2e-429e-8ad0-4380d13fdff7/47112978447.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/66453860978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5efe7f-d915-437d-bef7-04fb7ffdeeac/61455434273.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/cutting_edge_student_s_book_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c8b6ea-3c0d-487b-bb48-2ac22476b98f/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1f58d3-197d-4100-9ea0-87e71935c665/daxot.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 6

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_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 5132 bytes
SHA-256: 41f7d3094c9f2b69aebdb562a6912f503bc1c35e544c85443daab247c0cc7d74
font_01_sfnt_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 10124 bytes
SHA-256: 4689ca3af690e866e1b9006d5837099cfbc0cae92ed6eea08ee0c1a499f5455a

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