Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a75dd9b42a3b07…

MALICIOUS

PDF

70.0 KB Created: 2020-11-10 15:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bc1d36df7ae00b1a11282bfd52660dfd SHA-1: 00b3d6a276081b82a514659fca9934acefd285d7 SHA-256: b4a75dd9b42a3b073900cf7073668fd6813637044f9d233150e64f7ff953ca3f
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic indicating it is part of a link farm, with one primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/strik?keyword=unlock+code+for+rand+mcnally+lifetime+maps PDF link annotation
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/6973536.pdfIn PDF document text
    • https://ramitafot.weebly.com/uploads/1/3/4/3/134340854/libedav.pdfIn PDF document text
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/f02e7d5e2a5afc.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/biwuwukesazef/2328950089.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/cursive_capital_letters_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60741838-25ac-4a5d-a535-b0ae71c82009/mobajeputimadin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6256d6a4-8f93-4b9a-970d-9762925eb1c8/85125308669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe07829-ad78-4b31-8eab-59bb35dce37d/tujotonuxanobudevuzabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e0aa08-b404-4faa-a11d-d26db8ece805/gaxojalobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936049e6-9a60-4859-8c61-f69ce166ba6c/postal_supervisor_exam_642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a862c68-0d90-4e95-8acc-0b92cfb646a2/99814396449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd507c7-8634-4d00-acc0-258ec01f850b/38474422445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89b628c-eecd-4936-851a-aa3fcab39d98/17730457503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b6e81f-8c97-4257-a5b3-a58940b4d406/tepowojijobakaxozoxakim.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 8

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_off0000d173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 5456 bytes
SHA-256: 737df30a59a6a664f2cf9cfc98a1fad4fa436f8c732c92664574b0a797c755c5
font_01_sfnt_off0000e3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 11412 bytes
SHA-256: 6a6601be2faea499d6706f1dcb96e2160b00b00ae4f9e26bf3a5ead2e07bce62

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