Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c75d630c88e31bc…

MALICIOUS

PDF

70.7 KB Created: 2021-01-03 11:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9828740ed5e28b8db84b0131baecac6e SHA-1: d22105cae1085ec2ee96c6e67e4e9169908849b9 SHA-256: 8c75d630c88e31bc9d36e37325326b4b0f30dee3c9c31120f545e8b49d25b182
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://traffking.ru/aws?utm_term=beautiful+flower+pictures+hd+free'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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
  • 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://traffking.ru/aws?utm_term=beautiful+flower+pictures+hd+free In PDF document text
    • https://cdn.sqhk.co/melukate/f1dibjd/sushi_boat_catering_menu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416332/normal_5fa5a12610bb5.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/c124a2be-d41e-40f4-86c2-2c1e5d9e5632/jatawobuzoxab.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/the_interlopers_theme_and_setting_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f816d8-885f-4751-959a-1e3dba1299ee/civilization_6_trainers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16bfae98-6a62-49e2-bf10-c8ed6abd9937/car_door_seal_replacement_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/newozatewebaliwef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b827087e-b64f-4e75-b156-db05e6581143/ego_is_my_enemy_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/18461786572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b77fcd7-5422-4170-8617-868934359876/word_with_shape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac54c87-2bf0-49cb-9936-dc01321a9acc/uc_berkeley_linguistics_faculty.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/corrugated_cardboard_sheets_wholesale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6231985-7935-467e-a08e-168976327aed/1935_silver_certificate_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bb0db1-ae1d-40ff-a74b-44694a7c96b0/what_animals_are_herbivores_and_carnivores.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_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 5384 bytes
SHA-256: f3ac266acffb8ae7927c4c2fe671c50879603b4f9b39dd01b468f7a1199247c7
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 10468 bytes
SHA-256: 1fa5161fe411a2673e362be3add1e626d6149bf04c8d20c609c278354df3b3e5

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