Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee4b9965de17893…

MALICIOUS

PDF

36.4 KB Created: 2020-11-03 21:07:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ec9a40c3068221181697dd9b5a4ee2ac SHA-1: eab44e5c776c8ac41e36e3bdb884899f3ad80150 SHA-256: cee4b9965de17893cde1b777ef031a952a6ec20908e5377944ee8b8ed12b53d7
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the same URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click the malicious link, likely leading to further compromise.

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=powerblock+dumbbell+workout+chart+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366653/normal_5f8a2255210c2.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/juzalizuvar/fancy_pants_4_poki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85946c3-ae3e-4e53-b28f-e8fd64b08bf0/fenufidezu.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/pathfinder_reach_weapons_and_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/zolo_liberty_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/nusuvagarefolasevutajorew.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/1mdb_audit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd72fc9a-a0e9-463e-831f-0517b80af8b1/36455018291.pdfIn PDF document text
    • https://s3.amazonaws.com/modowor/raze_3_unblocked_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8659db6e-95ab-410b-a305-db173758a103/fisawewufibabovozuzid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7718e798-adcb-4715-82b6-7cf74ef0df17/sony_hxr-nx100_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/29364616912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f387dec5-261a-4eac-a512-b4b555635a2f/91187997936.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/voselenumimiretagowi.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_off00004f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4B 5516 bytes
SHA-256: 5ecd33676fd20e3d57addd4fdf5ea5b7431440dbe6b949d98485e63b0423be44
font_01_sfnt_off000061ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EE 10096 bytes
SHA-256: 9b6816f147104bd6270d7c77aa7c5a7d9a1e62f672b020fa3790f0291649a078

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