Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8b7a8493e043cc…

MALICIOUS

PDF

36.7 KB Created: 2020-04-07 22:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 00b8ef0da12510f5897676cd47a796e3 SHA-1: 46e25d7fed50eb080ef607e5941c6111680bc2fd SHA-256: 0f8b7a8493e043ccef21e9304a5e81d00f4491bb517896e75ac5c2e17a61a772
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body text, though partially corrupted, includes a Spanish phrase related to downloading a movie for free, suggesting a lure for pirated content. The presence of numerous external PDF links indicates a potential for hosting malicious payloads or redirecting users to phishing sites. No scripts were extracted from this sample, but the overall structure and link farm suggest a malicious intent to drive traffic or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://armstrongenvironmental.org/uploads/1/3/0/8/130874257/130874257.html#descargar+tres+metros+sobre+el+cielo+gratis+completa
    • http://omonyourown.com/uploads/1/3/0/6/130622061/tuxudusamuxupimofiti.pdf
    • http://fallinglava.com/uploads/1/3/0/5/130540926/dipuzefuxuna.pdf
    • http://incurableanduntreatable.com/uploads/1/3/0/6/130639592/4152512.pdf
    • http://ravensteadfarms.com/uploads/1/3/0/8/130874535/04f920.pdf
    • http://desertyoga2018.com/uploads/1/3/0/7/130776406/mefefilap.pdf
    • http://elementslifecoaching.com/uploads/1/3/0/5/130589338/wepemenaxanoz-giposelagi-vofebovoba-fokexufofe.pdf
    • http://peacefulpacaplantation.com/uploads/1/3/0/6/130621075/c22647.pdf
    • http://moralityinthemarketplace.com/uploads/1/3/0/7/130738621/kujusa.pdf
    • http://tcfit4u.com/uploads/1/3/0/5/130543134/3824665.pdf
    • http://havensconstructioninc.com/uploads/1/3/0/5/130546497/5886753.pdf
    • http://iampetemako.com/uploads/1/3/0/3/130379142/donewijosubik.pdf
    • http://portfoliofrancaisdejj.com/uploads/1/3/1/3/131398598/kobifus_jujuvonerak_kuxozoribegizug.pdf
    • http://evertara.com/uploads/1/3/0/6/130605222/tuxujasevaduxotatuwu.pdf
    • http://hearmyheartconference.com/uploads/1/3/1/4/131406717/2765237.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006351.bin
9aa1fc5d7ab2db521fafdbc59f2be3bbe04a7e9bc3a2c657cbe9f47106b7e4c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6351 8956 bytes

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