Malicious PDF — malware analysis report

Static analysis result for SHA-256 90da27e6052e2023…

MALICIOUS

PDF

71.3 KB Created: 2020-12-05 02:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 41586d283ab6f75545ce284b87f70681 SHA-1: 2e07d903ae05f639f06dcde07210fc828f8e1117 SHA-256: 90da27e6052e2023d5422d8cb0d358b2a1043b84057f32bc3598de84a6af6d77
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. The document body, though heavily obfuscated, contains text related to car tires, suggesting a lure for phishing.

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://trafftec.ru/123?utm_term=avid+ascend+gt+-+size+215%252F55r17 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473041/normal_5fcad12a53e29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448733/normal_5fc56b19d2eda.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/578d4328-c854-4fbe-af21-54b0aae0c81e/the_richest_man_in_babylon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5c01da-e343-4d99-b96e-2af87f04e4bf/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d111bd-ea91-4213-83f2-33e88902f9e8/10500710088.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc3370f9b1ed0353845732f/1606629136070/nonalijokusixaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897df9c4-3d90-4f81-9af3-c4cf9631f133/tuneludejawuzaxekuzogoruk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc574d0fa04221c71d8f1ff/1606776016940/patagonia_nano_air_hoody_backcountry.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4d2f173fb5383b989de1/1606372656379/cargo_bridge_2_unblocked_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a78927a199023ad5bcf0/t/5fc702e3e2dcb1274de45194/1606877926109/kezakip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ee922e537a05ef165d44/t/5fc8b3f5a9f67830ca018851/1606988790121/vilitetapebexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db2d5c4-925c-45d5-83fa-1ad450190818/bunukew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a62df3a-4eaa-432b-a54f-f8dc36c738bc/tgmd-3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af5c51ac-1597-4f69-ba9e-77603a4c01df/vesuruwinaxoronisilura.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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 5632 bytes
SHA-256: 214f98b525df631c8a647246a2643f5e93495fae8657b4515c8d05c8f966a676
font_01_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 11000 bytes
SHA-256: 35bf47017dfc07b4dc063a3ae39dead9b902b726f6f93140773a72a5badc8da9

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