Malicious PDF — malware analysis report

Static analysis result for SHA-256 7221cb5ba32a4049…

MALICIOUS

PDF

63.4 KB Created: 2020-12-19 17:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 131058bbf22768a96e8cee6b57a62aad SHA-1: d7cd73ac857dbccec33607534c087bbd2b8ae06a SHA-256: 7221cb5ba32a4049820263ca0f8c38e9d8ee2757d1b7bd98c7736930d93462c3
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL is the primary indicator of compromise, suggesting the document is a lure to a malicious site.

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
  • 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/strik?utm_term=la+fitness+seattle+open
    • https://cdn-cms.f-static.net/uploads/4382209/normal_5fa63b0b69790.pdf
    • https://cdn-cms.f-static.net/uploads/4401694/normal_5f9899414fe61.pdf
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/lumufapako.pdf
    • https://static.s123-cdn-static.com/uploads/4471985/normal_5fc7fdd4ee22b.pdf
    • https://cdn-cms.f-static.net/uploads/4467601/normal_5fa788c8b46f3.pdf
    • https://cdn-cms.f-static.net/uploads/4478947/normal_5fb4b1af16297.pdf
    • https://static.s123-cdn-static.com/uploads/4426557/normal_5fcc951d5a61f.pdf
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/midabowejetep.pdf
    • https://cdn-cms.f-static.net/uploads/4412599/normal_5fb4c29f10263.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3dd476d4-722b-41cd-931e-6d846ed1d9d7/41076509738.pdf
    • https://static1.squarespace.com/static/5fc0eb456b97992eb55c2a22/t/5fc17a71cb3e0f577187de10/1606515314175/59863405139.pdf
    • https://uploads.strikinglycdn.com/files/a8459878-8a5d-4319-8447-3843dab3d08d/martin_luther_letter.pdf
    • https://uploads.strikinglycdn.com/files/58569751-85f7-4012-9ccf-c938072bc8c2/gartner_magic_quadrant_for_crm_and_customer_experience_implementation_services.pdf
    • https://uploads.strikinglycdn.com/files/9d236dd7-aae5-41ff-81bf-f4f5be84e6d0/what_things_start_with_e.pdf
    • https://uploads.strikinglycdn.com/files/73b43f85-0801-46cd-be0d-0b4916609a2d/23469713611.pdf
    • https://uploads.strikinglycdn.com/files/3eef1372-560a-4445-9b6a-feaf60c21c8f/disapibotovafupuduride.pdf
    • https://uploads.strikinglycdn.com/files/6acfd62d-4fe0-409f-9b50-3e78c6d34bfc/94260755211.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd68.bin
535e54fe84fac07a9fed30a327f42deb5e1eac089457472ad4fb14e5ac9a3b80
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD68 4740 bytes
font_01_sfnt_off0000cda6.bin
55dea94a723d051a865a39dba2f6431f3b45636f0b937f3e47415b6aa5eafcdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA6 10476 bytes