Malicious PDF — malware analysis report

Static analysis result for SHA-256 d044bcf4d2445500…

MALICIOUS

PDF

62.4 KB Created: 2020-12-23 15:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ebf5394b47042d180080a6b227dee201 SHA-1: d21b7a895615cb70ff782a07a79d2f94d279415b SHA-256: d044bcf4d24455006b7f04de840b97da51afc11918b12680ad2ec70748e512a3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs to a suspicious domain, identified by heuristics as potentially malicious and flagged by ClamAV. The document body, though heavily obfuscated, suggests a lure related to a game ('Bouncy dunk miniclip'), indicating a phishing or social engineering attempt. The presence of an external URI points towards an attempt to redirect the user to a malicious site.

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/strik?utm_term=bouncy+dunk+miniclip PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493282/normal_5fc2f998db7b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_5fa65343e1543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8704cf9ec65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_5f9e35a7bbcaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_5fbc833bd4bb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fda550a0a46b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489404/normal_5fc6000c72c81.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/f1f32cfa-a84a-4523-8b3a-231b574bb7be/enhanced_blood_textures_new_vegas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f028d0-2678-41f4-b512-51107836a9a1/xuzopizudufosazavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40fb354a-9e90-47c8-91a0-b0d22c7ad854/shadowrun_fifth_edition_character_ge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506cabfc-1b98-4c48-a19c-515b7c157f24/11252535131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff09a540-ab3c-44e3-9684-059e4e6ce4bc/probability_igcse_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ea5ded-67ca-4c1f-b6af-f43f5611d0b3/3898518015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9a5269-861c-4ff7-bf75-3b5c80f6cd48/wadol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41bfd154-b7a5-4b04-b1f5-906bcb76397b/hover_1_max_hoverboard_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af85b09a-1eac-4c68-8e2d-9fc8292711bc/7th_grade_genetics_unit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc16f4f0-cf2f-4b0e-8d16-203bae6ba386/1920811058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47fa206-8294-4e6b-8c8b-34a4b41fbe46/46855253577.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_off0000bb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0B 4948 bytes
SHA-256: 6c464b84638afa19f92b82e122c2ee0eb7fb27d443344ab4a927ffd01516710c
font_01_sfnt_off0000cbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE5 9636 bytes
SHA-256: 2994975dd42edf2f1f85fa001de091ff2e2830dadf17d1d1212c0ff69ab6dd22

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