Malicious PDF — malware analysis report

Static analysis result for SHA-256 042158b7c9372d88…

MALICIOUS

PDF

70.1 KB Created: 2020-12-22 04:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 69b689dec50bd467a3bbb5fa17fd3c41 SHA-1: bd03b5ed90a9c1d7c539be427d9cbf61efe3d4eb SHA-256: 042158b7c9372d88ee56386539b196579fd2a2b1722a1b68af6d02b97c36b52d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, with the primary suspicious URL being trafffi.ru, disguised under a search query for 'christian coloring pages for preschoolers'. The presence of numerous external links suggests a link farm or redirection scheme to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=christian+coloring+pages+for+preschoolers PDF link annotation
    • https://rujedupexiveviz.weebly.com/uploads/1/3/4/8/134874221/266de46.pdfIn PDF document text
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/4124283f7158.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/3914790.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/rufatoluwo_gezazisefutato_gupexuzalipexu.pdfIn 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://static1.squarespace.com/static/5fc136563398ff7515300e75/t/5fc38b379ee0f32b87c121e9/1606650692249/30035489640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7247b818-8826-4056-95fe-2c80a863309c/bapupegasibib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17ddbf9866f3fd2d885d9/t/5fc3bea73570fb44d1755e61/1606663847752/71775808671.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f252e5c7695ca99bde90/t/5fc850f5e101942bf76c7db5/1606963446040/tomb_runner_2_game_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/johnny_weaver_pro_wrestler.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/57031171459.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/26287110909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0febe3-a49b-4085-99a6-b60537fda9dd/dragon_ball_z_shin_budokai_2_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfc5d2edfcd2bda917939/1606220894191/boyfriend_application_funny.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_off0000c72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72C 5088 bytes
SHA-256: 316f60feeba4c933d575fdd9541833bc7350ea1efbce7af46d8cff288097f70b
font_01_sfnt_off0000d872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD872 10916 bytes
SHA-256: 60f4252e149e4a090a590485e4ffdcaa724f7c8e5bf4afda03a18e4517cb53c5
font_02_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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