Malicious PDF — malware analysis report

Static analysis result for SHA-256 7385bcd256520663…

MALICIOUS

PDF

163.2 KB Created: 2020-11-24 19:07:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be7c5b56d61d2aab22fb4e2ca9cab714 SHA-1: 4e4b650189db3076a679925a376f9c8c566e4fbf SHA-256: 7385bcd256520663fb606634e3f1b82bbe72da4a60abfda6bf18b18f21565ed3
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://cctraff.ru/aws?utm_term=lancer+rpg+character+sheet'. This URL is likely used to lure victims to a phishing site or download further malicious content. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/aws?utm_term=lancer+rpg+character+sheet
    • https://valogasode.weebly.com/uploads/1/3/4/3/134320371/172735.pdf
    • https://bonunobomatujo.weebly.com/uploads/1/3/4/3/134318799/8171802.pdf
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/16873d38e64cb0.pdf
    • https://fesoviso.weebly.com/uploads/1/3/4/7/134710514/zulisovevenuti-debabavinan.pdf
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/rojobutu_jenuf_fubajaga_gajom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/971f1fa8-b851-4438-81b4-2c1d920071e8/62247863001.pdf
    • https://uploads.strikinglycdn.com/files/69068f9c-17d8-4a3d-8ade-0bdc7526cfa1/kekibewevajenexusaj.pdf
    • https://uploads.strikinglycdn.com/files/272c8620-c45f-4689-859d-c0c1f0092be4/goraliwovarafiwukelom.pdf
    • https://uploads.strikinglycdn.com/files/95015b94-4c06-4b5b-8087-97dd0696e1e7/dm_guide_5e.pdf
    • https://uploads.strikinglycdn.com/files/30a7c7e9-b577-4cd0-bfdb-6f5488421844/wuvogetesexegaven.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002483f.bin
4cf61f9a3c8cb1b3fb42fea11108c4e482781aa48c51512b32ab6370b201b43c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2483F 5104 bytes
font_01_sfnt_off00025998.bin
3786a15973d8de351953f339c7eb1643a53c3db6c5a803d2ded321049e4210d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25998 11180 bytes

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