Malicious PDF — malware analysis report

Static analysis result for SHA-256 46254e5189f79c78…

MALICIOUS

PDF

31.2 KB Created: 2020-10-04 03:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 381aaf9a067eeb70336c68f873590ac3 SHA-1: 3eb1f48af79a44ea9f579d18bd857b679b5612e1 SHA-256: 46254e5189f79c78fbcb6038221c8c8d973e6ff8de2363b662940a06000b868c
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firing suggest the document is designed to lure the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://gettraff.ru/strik?keyword=casio+scientific+calculator+fx-350ms+manual In PDF document text
    • http://files.scarfandbow.com/uploads/1/3/1/3/131381134/8110390.pdfIn PDF document text
    • http://kasave.tkestateliquidations.com/uploads/1/3/1/4/131407227/27ff2c.pdfIn PDF document text
    • http://kodebe.kaoticnotes.com/uploads/1/3/0/9/130969469/tomudevikuduxid.pdfIn PDF document text
    • http://files.brianholmphotography.com/uploads/1/3/1/8/131872238/28f3905d05a94c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0711/3373/files/soccer_game_unblocked_66.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/marvel_contest_of_champions_free_units_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/summer_jam_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6531/3942/files/direct_and_inverse_variation_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca3385c-4e33-46e6-8311-011fc3263930/74819671266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d481fea8-99ae-4615-8dd2-f8b4f8c25b8c/kixezunefer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fa21d1-d138-4e1d-bdd3-cc768b4f6231/duzexisaziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f703eee-5382-40eb-bf25-200afbddb7ab/16205393284.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_off00003eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3EEC 5460 bytes
SHA-256: 17733daf35a5137f7124c6755ab91d789cabe33ef93c815f4c64483bb2e8e3a4
font_01_sfnt_off00005173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5173 8944 bytes
SHA-256: a09b50230b83ba1160ca11684d4c9e0454d667d952c367c48b0e3ddf63f84510

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