Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe498b38a47cb083…

MALICIOUS

PDF

76.2 KB Created: 2020-12-31 08:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b82f44e53aea83478c1e2d9e7e20120c SHA-1: 752e475693186445a870b32ef1c565f72def9878 SHA-256: fe498b38a47cb083b253cdf469303d6c2e132d3d30991d9351ebecd709487486
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?utm_term=industrial+revolution+study+guide+unit+5'. The ML classifier also flagged this PDF with a high probability of being malicious. The embedded document body, though heavily obfuscated, suggests a lure related to 'Industrial revolution study guide unit 5', likely intended to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=industrial+revolution+study+guide+unit+5 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fd06e5130253.pdfIn PDF document text
    • https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/25b401bd.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/ef3e31983a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469378/normal_5fc545a85dfce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_5fc22d0faba36.pdfIn PDF document text
    • https://bevugatumuga.weebly.com/uploads/1/3/4/3/134316863/jofizosudobinezo.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/08101dcd-1864-456f-8369-36aeb0b3eb09/porotepuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/chatuchak_market_map_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/40953266806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649da3cc-0af4-4d2a-8885-6166747c5c45/43928935755.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/york_county_parks_and_rec_jobs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaeb6ba7-821f-434d-9299-e260882abe85/68766456166.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_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 5216 bytes
SHA-256: 753eea3f74635738f5f11024b3e34d3a1b6f3d29867ff82bed3772fd05cc4afb
font_01_sfnt_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 10400 bytes
SHA-256: 0b5e728d8469a33f7220eee84eaed487ca4023f8bd235540421601d5b1dd692d

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