Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29e7cca6043bcd4…

MALICIOUS

PDF

142.7 KB Created: 2021-06-01 01:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a755a8b1795e59df024662fb3058f1ba SHA-1: ee3bb9b121933956f07f045745d65700037d7529 SHA-256: f29e7cca6043bcd467e5501188f8e7548f81c60634f79ecfcf19dcbf8895389b
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high ML score. It contains numerous external links, many pointing to PDF files hosted on Weebly and other platforms, suggesting a coordinated effort to distribute content or redirect users. The presence of a 'Password-protected archive lure' heuristic indicates that the document may be intended to trick users into downloading an archive, which would then require a password provided by the document itself, a common tactic for evading gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://huntic.ru/pbw?utm_term=fundamentos+de+microbiologia+de+los+alimentos+cuarta+edicion+pdf
    • https://gunowiwusofemu.weebly.com/uploads/1/3/4/7/134705227/dowowakezexax.pdf
    • https://kevosenebiv.weebly.com/uploads/1/3/1/8/131871602/3d12b7e3016652.pdf
    • https://duloduwo.weebly.com/uploads/1/3/4/8/134850843/zipovufixa.pdf
    • https://cdn-cms.f-static.net/uploads/4407303/normal_6046ead09e343.pdf
    • https://wemavepudobug.weebly.com/uploads/1/3/4/1/134108610/rojijirugafemuluse.pdf
    • https://wuvatefowid.weebly.com/uploads/1/3/4/4/134470889/bc5d62bcfb10ce.pdf
    • https://cdn-cms.f-static.net/uploads/4450419/normal_606e0be356273.pdf
    • https://denimuka.weebly.com/uploads/1/3/4/5/134582609/6b86236d.pdf
    • https://static.s123-cdn-static.com/uploads/4372721/normal_60074640dd71f.pdf
    • https://static.s123-cdn-static.com/uploads/4365998/normal_5fccaa3c5069f.pdf
    • https://rapekazojeroxe.weebly.com/uploads/1/3/4/6/134697974/082598b84.pdf
    • https://static.s123-cdn-static.com/uploads/4427780/normal_5feb32539a546.pdf
    • https://cdn-cms.f-static.net/uploads/4446507/normal_60222631a7629.pdf
    • https://static.s123-cdn-static.com/uploads/4452607/normal_5fe25b3bb0b20.pdf
    • https://zukunade.weebly.com/uploads/1/3/0/9/130969607/gotez_fijelopexasudot_dazidebijete_donebofomiweno.pdf
    • https://lavigumujow.weebly.com/uploads/1/3/4/4/134438710/bezovaje.pdf
    • https://xujesosa.weebly.com/uploads/1/3/6/0/136090165/46b56d.pdf
    • https://tubivafidet.weebly.com/uploads/1/3/4/8/134886435/xerutaduvewav.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_605fe8d2b29c2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dce3.bin
55566dc9e27315822de7c0b1a830c5413752b838882ae3d69045cd5d5c19c1ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCE3 5568 bytes
font_01_sfnt_off0001efbb.bin
65671dd99e3635dfed7ece7ba5a16d09a5185e7cc71ddc081addb829e061bbf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFBB 10900 bytes
font_02_sfnt_off000214f3.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x214F3 16204 bytes

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