Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed4f8240804f15a…

MALICIOUS

PDF

75.2 KB Created: 2021-01-09 16:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b722a10bc75a41f5ed2592b5d5fb08d0 SHA-1: 7287221f1e40036d545156694f8f0220418470cf SHA-256: eed4f8240804f15ad3e0abf70121be2d27b432f7d8743e9b4ba76cdb3a82a263
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffnew.ru/123?utm_term=tallest+tennis+player+2019', which is likely a phishing lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The presence of multiple external URLs further supports the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffnew.ru/123?utm_term=tallest+tennis+player+2019 PDF link annotation
    • https://cdn.sqhk.co/varaxupumami/SRhwmll/undersea_fiber_optic_cable_cross_section.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444374/normal_5ff1dc10c148e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9f0af1b48ac.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/hKsjaha/game_of_thrones_stark_family_members.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzijaxab/PLGjijb/86934880585.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/2a736606-e8d9-40d5-a3dd-8375fb9543bb/7878680977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8619fcef-77ef-43ab-bbd5-c5488f2a4b68/vuzobegetudunik.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/homer_city_pa_vet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32f480f-6df9-4e5b-8a67-6472361ec37f/rujoxewuwekuvosuzajoru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fa9beb-7c14-41bb-9f13-7639a29d4a4f/telecharger_famisafe_location_tracking.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_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 5348 bytes
SHA-256: bce3cdd50f0d6e99efc8f88b0f0acf20c9af08f0da5121d994cef53b9b368b31
font_01_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 11436 bytes
SHA-256: ec45b03396294eb7ed3b042b2b9ff853a554e7589c0e2f7832e0be0e1f2680ef