Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ded1720a8c2f6a2…

MALICIOUS

PDF

66.4 KB Created: 2020-12-18 08:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2cef8c2a3981d00588e4dab52c938d6b SHA-1: 3f8a1111802ca837a729203c269636966734de23 SHA-256: 8ded1720a8c2f6a2b947b2b0b80f82e64ebd7fc7cef640069adfccecf324f75a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?utm_term=heavensward+collector%2527s+edition+digital+upgrade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4460233/normal_5fd85a23b39a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_5fcb67f3dde21.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/viboxikuz/introduction_to_mythology_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/koxoxadosulovojaxexusewov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a968875-0156-409e-8b54-969584d94764/history_of_film_editing.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/87445020028.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/preparation_of_aromatic_hydrocarbons.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/mibirutofajibit.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/bronkiolitis_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3404f86-8b31-4dba-b9bf-892cab42a06b/99998810373.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc118763f75b16643fb0c4c/1606490230730/9534881149.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/32314207645.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_off0000c2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F4 5388 bytes
SHA-256: 20f0ebdffffcaf0e110c634cc0b7c2e29062fd52953d62e104ffb39458e0a8a0
font_01_sfnt_off0000d571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD571 11952 bytes
SHA-256: b63b290bb2c14e4d71750d9b070be9b6ff4dd7c8fa070f0bef48f4773c9ab844

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