Malicious PDF — malware analysis report

Static analysis result for SHA-256 97b6a0d582188e45…

MALICIOUS

PDF

98.1 KB Created: 2020-12-31 00:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cb12c7ff221c966250e05102352bfd71 SHA-1: bb5f014e70c0f2ce1094261cfe5ac014d9d88fba SHA-256: 97b6a0d582188e4505405fe2de30d114d69a6f68f0c263f5b3ef93b4ffa16af0
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'traffmen.ru'. Another critical heuristic indicates a PDF link farm, with 26 external PDF links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs and heuristics point to a malicious redirection scheme.

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://traffmen.ru/strik?utm_term=beer+pong+table+painted+designs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_5fd64bd680a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_5faebc966e9ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392872/normal_5fcf4dbc8da86.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/duberumelaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f90f2d773970.pdfIn PDF document text
    • https://mekufaro.weebly.com/uploads/1/3/5/2/135294947/3443138.pdfIn PDF document text
    • https://xekelubapakam.weebly.com/uploads/1/3/4/4/134499273/nasolujametudadez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377115/normal_5fcda77a97cee.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/tikofaketonub/91797412360.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/reradarafojepap.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/sagubi.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/75529572893.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/45819715906.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_off00014464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14464 5316 bytes
SHA-256: 5870c34c85fbcf7b1cbcc08aee77981d8bee79b5cd7c24ab3365bdec53430f51
font_01_sfnt_off0001567c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1567C 10868 bytes
SHA-256: 2bcf6334b9ebe9f11be4c0d9a55406fbf3c0c478d14b0b4bd830ecb49256c87d

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