Malicious PDF — malware analysis report

Static analysis result for SHA-256 09dc052ecb351edd…

MALICIOUS

PDF

95.6 KB Created: 2021-01-01 08:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 550f71d12a16dcbbf24d9f1139f8fda1 SHA-1: 915336dc79f3453c5d56fc8f1ed954c399983d2b SHA-256: 09dc052ecb351edd2e144eeb89a96aeb43a70136aed64299ffeffe14d52a5081
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to music hits, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/strik?utm_term=uk+top+10+hits+of+the+70s PDF link annotation
    • https://cdn.sqhk.co/lazujanaziri/vQhejd4/download_game_stickman_slayer_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5f920791076ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_5fdbc24222d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5f9d7e2c00465.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/RDO8KOV/91081550675.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/pazerogasarinu/crystal_reports_tutorial_sql_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3f5df5-2f89-496b-b4c4-88b8b694a20b/vampire_the_requiem_2nd_edition_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291ac68f-ab4a-46ef-b522-1c25a0b15acb/doxidoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a19441e-b440-4308-b7f0-570bcc6b182a/9574428228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91cbdf6d-bd33-40db-8861-7e64626e16bb/wulogepejetemev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0acfebbb-648c-4190-ac56-36dad1248ee5/dan_the_man_hack_apk_2019_premium.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDB 2896 bytes
SHA-256: 9cd38b437c4a2d8519cf1b8a301fa578bab95e8ffc7dd47fc7126b5c86720859
font_01_sfnt_off00013629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13629 4980 bytes
SHA-256: 997c4f4081dd58006f6993f7b8d264a187cdbe93cf817380f31dbf9e3c74b9b9
font_02_sfnt_off0001473b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1473B 13332 bytes
SHA-256: a3c8b1f8482d587fe48d39959794ede87c2c402b9772c8904c18c452d9330f5d