Malicious PDF — malware analysis report

Static analysis result for SHA-256 d986b7de98b29b4f…

MALICIOUS

PDF

73.4 KB Created: 2021-01-02 12:34:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f13d83cf8e7023d17b6c48b67bb893ea SHA-1: 3f01c7a49c723fdcb35cc47c962d970cc7effeae SHA-256: d986b7de98b29b4f8ca63655c93569c2724bbc3c5fe0141525a6801f50461b1a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/aws?utm_term=a2dp+bluetooth+driver+windows+10', disguised as a driver download. ML classification and ClamAV also flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/aws?utm_term=a2dp+bluetooth+driver+windows+10 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486971/normal_5fc7eb4e773da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366028/normal_5fe19400a5192.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/jhdyOhf/14560639388.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/OFdgeij/moore_theater_plainwell_mi.pdfIn PDF document text
    • https://cdn.sqhk.co/jevikepuja/ubjg4zh/47404132493.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/xugigabitulu/chrome_extension_api.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef11e9e-b133-4e27-8582-0787207fb7f7/bomawadapuwoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc3b1af-3603-4a5b-8dab-35b500e7e525/escort_backpage_new_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/the_boondocks_season_3_episode_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7721eed-c1c0-4d7c-a2c7-380dfbb7fde7/xuvifupikoloresonitu.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/aggrenox_package_insert.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/best_training_coordinator_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5816ec04-1bd3-4a95-9a1e-e335c575d7c1/3ds_max_motion_mixer_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2775e7f1-1a96-4bdc-be1a-2842e67239a4/years_in_spanish_crossword_puzzle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd4e52e9-e92f-44e1-adf9-168b72f98bb1/dj_harsh_bhutani_remix_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff68daa9-be71-43e7-a116-2614d7aa05d5/monster_power_hts_1000_mkii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/world_s_easiest_game_quiz_cat.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_off0000e21d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21D 5444 bytes
SHA-256: c0c773f9ff6516d9dcc1a9149f7b7ee2150be40420b8fd5d8e111d07334ab4c1
font_01_sfnt_off0000f4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 10552 bytes
SHA-256: 58a5670ad16017aed88cd03966768e5c3aea216f9818c0f62023c41de4e56bf2

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