Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1960c3fa34813c…

MALICIOUS

PDF

67.7 KB Created: 2020-11-24 16:24:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b4b3048e2107c2b7e4ecfe4269b4b438 SHA-1: dc1ed7e3964b84dd440742424833aad70bec759b SHA-256: 7b1960c3fa34813cb1c3998eeb0a836e286c5890b82001c3dc46236db295fa7f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though partially garbled, contains text related to unit conversion ('200m to nautical miles') and references the wkhtmltopdf tool, suggesting a lure. The presence of an external URI pointing to 'traffine.ru' further supports a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=200m+to+nautical+miles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375514/normal_5fbbd0b2321c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f9cfaa147224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457604/normal_5fa7c4459e3d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374696/normal_5f9ae89d8cd52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5fb3e08a56792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_5faa19dba2fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f939a7c68639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446492/normal_5fa9e6daa1769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f999b0629eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_5fa197c16e895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f9a151c2c7b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_5fa898bbbf9f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_5fad2c5b7973f.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/wonoti/crisc_exam_prep_course.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/which_branch_of_the_government_collects_taxes.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/monaco_general_information.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_off0000cdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF9 5028 bytes
SHA-256: c4441504a1c85d032b0726173e0509037581987d24494d245cd49b9170921157
font_01_sfnt_off0000deff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFF 10292 bytes
SHA-256: b2dcc1eeafb5657aa6e613773ce48a881b774c07ce7d5d394cf9d1c467d985a3

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