Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4ad2bd4237236a…

MALICIOUS

PDF

68.1 KB Created: 2020-11-28 19:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7df5301a97286a350d53b706f28546c5 SHA-1: d344e4f5b70dcefc77c8d26001656e6fdd9aaedc SHA-256: eb4ad2bd4237236ab707ee402fd6d799af1cdab3f223e37bdb7cb51db4b37755
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://gettraff.ru/strik?utm_term=origami+with+printer+paper In PDF document text
    • https://rofosuvobatijam.weebly.com/uploads/1/3/4/6/134661532/e6c4dd.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/3185066.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/0656654b-2988-4162-b3d4-c8aeb31e71a1/bugewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85afbc4b-79b5-4132-8e5e-9b3fe8c2f39c/12384119686.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/jegelojiwesubadepogepi.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/kuby_immunology_7th_edition_academia.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/short_anxiety_screening_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06fb007-058f-480f-8840-26cb23f7ace4/jawotafopowudurewebajudis.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/63740989131.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/zirogabizunategafitopawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4256eaf1-35a0-41de-9a58-7e57677029ac/87449421498.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/individualistic_culture_simple_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/waxuxumefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b6028d-9d08-4e9e-945a-f5c0673a0e02/pekigarof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8932e3f-07c2-4673-91ec-4a94c52fcd82/60942893255.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_off0000cd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD32 5140 bytes
SHA-256: 2789e26edad11389a35d226965d2d48b4a3b9822c366db673451ffa6d546cba6
font_01_sfnt_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 10904 bytes
SHA-256: 66e9c90e04bbc54b95825e5439453ca1dd95e4b6718c8237c1e67200c38a9aec

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