Malicious PDF — malware analysis report

Static analysis result for SHA-256 10428a63b00525fd…

MALICIOUS

PDF

69.4 KB Created: 2021-01-01 14:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3e56f073158939f730a2455313f6154c SHA-1: 7182de08ac76aa4d854a2027f68483838bd1b90e SHA-256: 10428a63b00525fd41e27b0628753905ad3746096a030fa44c895e4df2ae219e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=alesis+turbo+mesh+kit+manual'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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/aws?utm_term=alesis+turbo+mesh+kit+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_5fe647c2e227b.pdfIn PDF document text
    • https://cdn.sqhk.co/kevejonob/Njehcje/43602366019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5f9f419e97f25.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/39jfDxd/toy_story_smash_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_5fa7e647a4862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd679de5bd26.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/sukedil/paxividonaxutomova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47abcc59-ac4e-41c5-991f-a5cb403b0207/7-3_sum_and_difference_identities_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45aa1f3c-81fc-45b0-9c29-6159b99be71b/62708256447.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/98109581739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4915f438-a2e9-4de7-ad48-6446b4293e21/spy_mouse_apk_pure.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/rogawetilasuvoleviwi.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/farifabimezudixolutogi.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/70482077980.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/32472507054.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_off0000d408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD408 5120 bytes
SHA-256: 2913ef4916853ed5d1b4201e29e3c5eca2f66172c41282659a3ac3aa03312536
font_01_sfnt_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 10376 bytes
SHA-256: 8514d8bf6068b997508348806c1ebe1bf99a87a535816986b7216be2463ff790

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