Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a40caa48757e7a…

MALICIOUS

PDF

64.7 KB Created: 2020-11-19 18:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 10a567ecdbedbda5343b2d16768e2b5f SHA-1: d62643d801ae2b55e768011dfac9c8dc24fd6975 SHA-256: e9a40caa48757e7a095aebbb75ada85d8518d1fcf792c54f9de1e518b43f8b63
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to link farms and redirectors, indicating a phishing or malicious redirection attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were extracted, the structure and embedded URLs strongly suggest a phishing lure, likely intended to lead users to download further malware or provide sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=how+to+keep+your+volkswagen+alive+torrented In PDF document text
    • https://jazakeramexevam.weebly.com/uploads/1/3/4/6/134615015/0d597cedb6a.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/1fd42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_5fad9abe0d14e.pdfIn PDF document text
    • https://xuberirerumona.weebly.com/uploads/1/3/4/5/134586272/6033019.pdfIn PDF document text
    • https://lefutolemisu.weebly.com/uploads/1/3/4/7/134711730/9563262.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/1332188.pdfIn PDF document text
    • https://ziliseze.weebly.com/uploads/1/3/4/8/134855349/doragik.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/2684668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_5fb00e3c66088.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3d31f9bc-42b0-4e88-9ff1-ff8a1661112a/vaxemonal.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/16071755376.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/93663442234.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/45438645802.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/insanity_workout_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf905db-e641-49ab-999f-9694a4785ee5/ejercicios_tendinitis_hombro_derecho.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB293 5288 bytes
SHA-256: fbbe613e309eb1f06e1c3c81223c4a0eadd0fd12d973cdb4ebf386777e97079a
font_01_sfnt_off0000c4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B5 10172 bytes
SHA-256: d6a545016ae6f6a78b2d994f3ac5d2592bf792d72dff6c5dc039e4da28b9eb23
font_02_sfnt_off0000e75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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