Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbee124981d3fcb7…

MALICIOUS

PDF

73.3 KB Created: 2020-12-21 14:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f87074ba9487fdcb62879c9502fc29d7 SHA-1: 74dc3015ee1873911774e0c0374ade7fb3fecb95 SHA-256: bbee124981d3fcb74f37ca5e265ebcea4f8bb1dcfb5094b4af43677c65eeae0a
214 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and embedded links suggest it is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?utm_term=dig+deep+sports+quotes In PDF document text
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/xakewitejudaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_5fd8af48467fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_5f98bf631aaa8.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/vozetovuxukelul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8879c7e2b5d.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/1b7f902.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/bezutu/causes_of_plastic_pollution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7877a7d7-6ab2-4851-b534-63a6d4819f63/best_necromancy_spells_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab123d8-7bfd-44cb-92bf-2042e1f1f782/let_it_go_viola_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4bc0d0c-351c-4d37-919d-f22002bd0d25/30710551715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3679517e-2565-424b-895d-e8b5eb5eb4cd/pevifetotuzujuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3e20c3-4ad4-4f0f-be39-1c747080c6bd/92521130709.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_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 5012 bytes
SHA-256: 592b17f01c1a5157c9094996bf5109913d0a3f69e6998a5a45e8b6482b8a9a06
font_01_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 10596 bytes
SHA-256: 45af01f44616e0a13373f5f9ca154cf2d4abe91a042fe04e0b31e2c97cb1ebbd

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