Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f16e209e7fe714…

MALICIOUS

PDF

36.9 KB Created: 2020-05-21 22:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a869db55da611f05dc23e79df933a588 SHA-1: eebc12b435472254d204cff9d64b3d11d6235b24 SHA-256: 05f16e209e7fe714763b410bb1ec378ac1dd7b2606729bd5dd7545db58481ff1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating it's a dropper. It contains a large number of external links, many of which point to seemingly unrelated domains with numeric paths, suggesting a link farm or redirection scheme. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate an attempt to direct users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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.Dropper.Agent-8351133-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8351133-0
  • 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://adsl-63-204-18-10.benefitplans.org/uploads/1/3/0/3/130379528/130379528.html#hidrofobico+y+hidrofilico
    • http://janetsbook.com/uploads/1/3/1/4/131409546/rifedodageget_mewimabaker_lurowad_vuxawojirukuxuz.pdf
    • http://allianceforcatprotection.org/uploads/1/3/0/5/130539344/4e4ce40.pdf
    • http://56storekvl.com/uploads/1/3/0/4/130488993/govuwogegezosetire.pdf
    • http://crazypeak.net/uploads/1/3/0/5/130589423/ludexenalarul.pdf
    • http://wertsfamilyfarm.org/uploads/1/3/0/7/130776001/nizuweniduno.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006221.bin
5c8959d91168637d50bd5e5c998987aab8535f1dc53616b16521c3eea427a100		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 11724 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.