Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3685e4fb0484772…

MALICIOUS

PDF

61.6 KB Created: 2020-11-18 03:42:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0072b2d70d10df53ea62af5d62d03f79 SHA-1: e6a58e78e70aeb3416278c00a288fbc7c013415e SHA-256: e3685e4fb04847721b621dd9691470b50f61fe564bac5c77f12d4a1387e0a6af
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL leads to a domain associated with malicious activity, suggesting the PDF's purpose is to lure users to a harmful site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • 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.
  • 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=lee+spa+nails+lakeland In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f8a2f865a1fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f949e0f25f15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5f9057413771a.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/382f8cca1f0.pdfIn PDF document text
    • https://xarisoxetawekox.weebly.com/uploads/1/3/4/3/134399368/5e63faf4d7c.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/gexiwukexujetijik.pdfIn PDF document text
    • http://www.leespanail.com/WeIn 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://s3.amazonaws.com/kimoweworape/32410972836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b985a1ba-69f8-431c-9b62-9b6f068bf098/93423473298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10d24c08-4028-4972-88a2-eb3163a0f187/31101248307.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_off0000a839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA839 4460 bytes
SHA-256: ab7cab5dcb677a54e7d51297ad09bc474e68c8ec4f25cc3f1792afa8811278cb
font_01_sfnt_off0000b755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB755 10552 bytes
SHA-256: 4d1b17f096a357af15155c22cd5ffdc7b00489ed7e9393726a050e9fa8ff10c6
font_02_sfnt_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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