Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7543720cf69215b…

MALICIOUS

PDF

69.8 KB Created: 2021-01-11 12:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7c2d12196dd81c92f75d00a86b8bb7d0 SHA-1: 5195e5293c630ad44ecb89637fdf30c609b7c1b5 SHA-256: c7543720cf69215b6136d4c55c9e9d466bbae10998dcbcf371c3ff406f5371d1
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=itunes+windows+10+home'. Additionally, heuristics indicate the presence of a visual download button and instructions for a password-protected archive, commonly used to bypass security filters. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0'. These findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=itunes+windows+10+home In PDF document text
    • https://cdn.sqhk.co/veleviziwew/jcQijeB/.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5fe9394a58cc1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5fdfcf2216882.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/lia9Jif/46784029167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_5fbcbeb648f46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5ff7852769fb4.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/temujonuwu/35475779668.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/96319318607.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/gamers_only_images.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/sony_handycam_dcr_hc52_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/xufodaritulobowifazajop.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/ikea_linen_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/89416133794.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_off0000d33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33C 4948 bytes
SHA-256: 4d7df298ef95177d849ee82602e777605bbc5ac2fa15c72ad14531bcfa6082be
font_01_sfnt_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 12008 bytes
SHA-256: 371ea999ebc7673651d46d79aa5c755841a62d57302cfa913575b5d8b6eb3d29

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