Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f46e41b0eac43a…

MALICIOUS

PDF

171.2 KB Created: 2020-12-25 03:20:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c9f1f7be053be8d72dd7ea9a4424b9e7 SHA-1: 74b41ef7570e1b887858a82ab2cc1a435cb03610 SHA-256: 56f46e41b0eac43aaa3d2d910028225c61e01a65b6937581cc08c21d79a801c4
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/123?utm_term=solar+powered+watches+for+womens'. This URL is likely used to lure victims into a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/123?utm_term=solar+powered+watches+for+womens In PDF document text
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/jifowawopuv.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/3933556.pdfIn PDF document text
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/1876443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409623/normal_5f992f3399101.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/7b2c7baf-a04c-4d09-b06c-be9fc4cc7c14/bifazuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/bake_shop_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24453295-a08e-41dd-ad5d-b39dc6e89dcf/76668173594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcfc074f-3114-4167-9f35-7f1fe6ca3961/poxopatexutuban.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac93e343-7279-48ba-8d21-c2d5e2a0ae1d/cesar_chavez_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f706d3d9-1bf8-47af-9d33-cf97dece0b8f/25685282107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03a9c1b-67f0-4a30-b85f-a7afe09a5192/24009749733.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_off000266e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x266E5 5588 bytes
SHA-256: a4d2d5c709c008df9de7978a27db1d618a69872343616662f6b85d2857701432
font_01_sfnt_off000279d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x279D2 11288 bytes
SHA-256: 13aeaa8bd2421483e08ea399fdab9077dfd0508ef9094f796139f9e784f07411

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