Malicious PDF — malware analysis report

Static analysis result for SHA-256 88224c5e5071f7aa…

MALICIOUS

PDF

80.8 KB Created: 2020-11-23 20:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7074e8c5116a73b62773c53bddb400a1 SHA-1: 1a50b4661e3ff1452b4bd46f4f95ab14f3279a48 SHA-256: 88224c5e5071f7aad25c267cac37bc3bfd1efa5d4d2f24e9a7074a950980a128
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 0.9997

Heuristics 4

  • 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.
  • 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=the+binding+of+isaac+afterbirth+unblocked+hacked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381737/normal_5fac0683442ad.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/48b28d0c-15eb-46cc-82b8-d6d9af12f0be/xapipigosogem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0feae3db-65ea-4d9e-8fea-e1722662c48f/12839196816.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/97383284115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a07303-7fae-4030-8bf0-0d8fb23c6ef1/deleretutojisegodexe.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/pajuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b99e7f-7822-46df-9842-2a0f498814df/35620436705.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/veratavesakogevabaruji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6888ef-2cd4-4123-8647-1ee511151a9d/guseguxivujudazuwaseve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c72bd8f-8e53-4b7a-a883-23e4b4be3a38/best_race_for_monk_dnd_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8df7b1-039c-46e2-88b3-574069168881/figidepelodoben.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 5436 bytes
SHA-256: af6c2928689b20d87e6d0ad7a2358120419cd0e49a6953d6296f47594b34508c
font_01_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 11684 bytes
SHA-256: f263a8b80d362ac8cafc43d609581c5f63160faba8866971a7a95341ed767e58
font_02_sfnt_off00011e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6F 16612 bytes
SHA-256: ab9f9a649da89829966a2097ca5ebac507cd05a067f07b6714f7c8b0d98ba19e

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