Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a802e0641b7392…

MALICIOUS

PDF

39.3 KB Created: 2020-04-02 02:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ebd9936f3be266c7cce8edba06b294fe SHA-1: 2a7e5c5ac14eff36c76fa3cef05101d1cba1bbbc SHA-256: e6a802e0641b7392b687583078d2a6f5442a1a2ecc230e717a61ccd6b0d76e20
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO abuse tactic. The document body, though partially corrupted, contains text related to an 'Examen español' which could be a lure. The primary attack pattern involves directing users to a network of suspicious URLs, likely to host further malicious content or phishing pages. No scripts were extracted, limiting the analysis of direct payload execution.

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://rlfanrewards.com/uploads/1/3/0/4/130483191/130483191.html#examen+espa%C3%B1ol+bloque+3+quinto+grado
    • http://bestnecessities.com/uploads/1/3/0/3/130323181/9889088.pdf
    • http://kilimanjaroeureka.com/uploads/1/3/0/3/130323774/sidawu-duvujoleniveje-rugudorenusij-xigutamabopajo.pdf
    • http://newageoflight.com/uploads/1/3/1/4/131407061/ea5ac1303f.pdf
    • http://greaterthancreative.com/uploads/1/3/0/7/130775364/c7374bad.pdf
    • http://zuoxianglin49.com/uploads/1/3/0/4/130435898/94c17.pdf
    • http://ilawnmowing.com/uploads/1/3/0/2/130273801/kewek_relesigezo_wimenuzegixe.pdf
    • http://tridentjobs.com/uploads/1/3/0/5/130542872/3838090.pdf
    • http://sdsuoxford.com/uploads/1/3/1/4/131452961/7c1a8b78701.pdf
    • http://yonkersepoxyflooring.com/uploads/1/3/0/9/130969981/4d959a9607dff3.pdf
    • http://simplemedicalanswers.com/uploads/1/3/1/0/131070125/2fff21c63495.pdf
    • http://sarahchoi.rocks/uploads/1/3/0/4/130435888/dewomafana.pdf
    • http://pradallaw.fr/uploads/1/3/0/7/130740610/3934207.pdf
    • http://psychoannielyze.com/uploads/1/3/0/7/130775837/mowupowukun.pdf
    • http://daviscountyhandyman.com/uploads/1/3/0/2/130270798/4863989.pdf
    • http://andesperuviangrill.com/uploads/1/3/0/6/130604379/bd80202665ab494.pdf
    • http://iamherproject.com/uploads/1/3/0/6/130620926/4ac120.pdf
    • http://mrmohrclassroom.com/uploads/1/3/0/4/130489162/rajemanuvovaw.pdf
    • http://gocrunchy.org/uploads/1/3/0/6/130621815/xidexeritapewaf.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_off00006ed8.bin
19bc3cc41d56893e22dfa470b714408482a636b7b66628d22921b5fff517ba96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED8 8432 bytes