Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaead553fe9d9fed…

MALICIOUS

PDF

64.8 KB Created: 2020-12-30 02:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 908b032127c80549a35becb08cdf0aaa SHA-1: ae0db9c7f2d7c20d47755b2bb30bf2eb6aaecd05 SHA-256: aaead553fe9d9fed82fb2ecbf16cdd477e23086bf154f3453afe7361792bcebf
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://traffmen.ru/wb?keyword=lebara%20ksa%20app'. This URL is likely used to lure users into a phishing or malware download scheme. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this attack pattern.

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://traffmen.ru/wb?keyword=lebara%20ksa%20app In PDF document text
    • https://cdn.sqhk.co/dakagugi/hyDQhfX/fowukekevani.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f910e937b4aa.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/jjjhjeQ/25770756912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_5fb74fc550c5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f88b8c523f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_5f9ca8a38e596.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/a0772e4e-0cc8-43c2-ac5c-59640ffa5222/dash_mini_ice_cream_maker_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/benapawagonagepos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/423b7b14-954a-4d47-979c-98dba7164e63/56131220588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7d5a91-2440-47cb-9a02-08b93b3e5f86/the_nemechek_protocol_for_autism_and.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ce9983-ba17-4638-814e-073a286f161b/52858919061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b71d7c-2b61-43fd-87f8-a24c22ed0c3a/absolutistas_y_afrancesados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b925279-ba60-4f39-8b3d-b03aa0878342/frigidaire_gallery_air_filter_amazon.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_off0000c4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A9 4928 bytes
SHA-256: 67e5bf5806cd85de5bd70153f26d7a80c078e3422b2b7fb9ea41c439bdcc4946
font_01_sfnt_off0000d57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57A 9992 bytes
SHA-256: a5d5fb42682bfeff924201c133e5b7285e071721e8375c261d2386302de71590

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