Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf8fca2ac329344…

MALICIOUS

PDF

79.0 KB Created: 2020-12-24 03:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fd8fc8009681781dab8aace45c00344c SHA-1: 7d4b3891cb6bcd965e8b7f3c8347029ae79f0473 SHA-256: dbf8fca2ac3293443a059f36c138a903f9eee2df39cbc5f80274a59feeeec70d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'traffine.ru', which is likely a phishing site. The PDF structure and embedded content suggest an attempt to trick the user into visiting this external resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=underhanded+definition+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420244/normal_5fa9007b963c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f8e1b14da5e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393755/normal_5fc5a156df7a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8df2024fcf6.pdfIn PDF document text
    • https://cdn.sqhk.co/kupemopo/cghQjhX/lazojuwusazasemero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_5fada4a4c63e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5f8ba6639eb3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418000/normal_5fb5843f79f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f8738e2a6952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5fb470572938c.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/icibLKn/84420025989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_5fbbfa32b5082.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/abd5ec85-b907-44b8-938b-87613616d339/suxoguno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0e2746-0881-47e9-a70e-1b139ad56af3/41335197005.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/basel_3_final_guidelines.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 3016 bytes
SHA-256: 97a1b257d0374fa318de267f46c0dc1ac3975f911ae519816f3a085cc6964dc1
font_01_sfnt_off0000e435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE435 4948 bytes
SHA-256: 20808f0c05d79884030fb1e64b5f1e95ffa2ce1af1d9d81ca9636c2c5b3a03ab
font_02_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 13188 bytes
SHA-256: e7980173ff01b388674f6e35aea0b316e076e1af5f660df662e882f256320f22
font_03_sfnt_off00011ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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