Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeceb65f08823cb…

MALICIOUS

PDF

63.8 KB Created: 2020-12-21 10:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9a92b9ba20937df8a3cc96815fdcb19 SHA-1: 72a5002642bcd37c4e24f864d677046e902ebb62 SHA-256: 6eeceb65f08823cbdf29ea3fd3aef28d5df0bb9a3aee3762fa49d0427c591595
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL point towards a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=chocolate+pudding+recipes+easy
    • https://static.s123-cdn-static.com/uploads/4473971/normal_5fcfb2c834ff7.pdf
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5fda72c490158.pdf
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5f8c6583405db.pdf
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/dalaxoxipuges.pdf
    • https://cdn-cms.f-static.net/uploads/4418762/normal_5fbeecb44b447.pdf
    • https://nipogoloduvi.weebly.com/uploads/1/3/4/3/134368022/a023797ae216.pdf
    • https://static.s123-cdn-static.com/uploads/4469623/normal_5fcc458bae333.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc50a6fc30a162e0c6d1fcc/t/5fd600bdc4373837b9009f7f/1607860414671/76643987726.pdf
    • https://uploads.strikinglycdn.com/files/e3261a32-22c7-4ce1-ba95-7c6cb4596db7/bubivazifaropumisuv.pdf
    • https://static1.squarespace.com/static/5fc0e940bd14ff0dd29cb4d3/t/5fc3b2c8173fb5383b143283/1606660810816/usmle_step_2_clinical_skills.pdf
    • https://uploads.strikinglycdn.com/files/a421f97b-e33e-414d-94db-da9b2ea02569/19068184535.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b05f.bin
912eaf50730b0cb58cc19fbc680288689d5f97b3ec8b0baad0b0e4d19d00862f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB05F 5340 bytes
font_01_sfnt_off0000c27f.bin
84b6d67e55b3fc946191893c77c73c56630c89945ec213766f4901ce01ab951a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC27F 9908 bytes
font_02_sfnt_off0000e45b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE45B 4324 bytes