Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bab80d2db624d8…

MALICIOUS

PDF

43.7 KB Created: 2020-04-08 01:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec30a2692a79cffbfbb9f5a37776a50c SHA-1: ea48fa2d846e31808b3312ca1259ff4df767abad SHA-256: 04bab80d2db624d85fbbdc445e3d6653b42f9c3e794bad69fe6c9f146974de66
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links disguised as a product review, aiming to redirect users to potentially malicious websites. The PDF_SEO_LINK_FARM heuristic indicates a large number of these links, suggesting a link farm or SEO spamming technique. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://agapeprops.com/uploads/1/3/0/2/130289266/130289266.html#samsung+jv3+phone+review
    • http://drewkjones.com/uploads/1/3/0/5/130551064/surokijupaxezekijo.pdf
    • http://bubblebagsaustralia.com/uploads/1/3/0/7/130738989/9613176b1039126.pdf
    • http://ag-coin.com/uploads/1/3/0/7/130740265/b35bd736c304.pdf
    • http://jctbz.com/uploads/1/3/0/4/130488248/bikizomud-dimed-xetilojuxome-batav.pdf
    • http://easypresenting.com/uploads/1/3/0/5/130590140/abb69b8c1.pdf
    • http://markburns.info/uploads/1/3/0/2/130271068/1063105.pdf
    • http://mail.showmedental.com/uploads/1/3/0/7/130739163/nobakitivonofu.pdf
    • http://jandwcleaningteam.net/uploads/1/3/0/2/130270980/444108.pdf
    • http://gratiotdems.org/uploads/1/3/0/6/130639201/4570870.pdf
    • http://englishlanguagelearnerresource.com/uploads/1/3/1/3/131380436/9dc5b768be7a4.pdf
    • http://coutureeatz.com/uploads/1/3/0/6/130604716/fuviwuwu_musebilugutir_mujubilu.pdf
    • http://bluewatertheatre.info/uploads/1/3/0/7/130739213/fazemaz.pdf
    • http://ammoheadquarters.com/uploads/1/3/0/9/130969950/1016522.pdf
    • http://jeromestover.com/uploads/1/3/0/4/130483428/bepitixotesonamoz.pdf
    • http://soundslikebeauty.com/uploads/1/3/0/5/130588256/4103445.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_off00007f5e.bin
a625c080f197e9deccad72792c50568e9defa6d56668a6823992c157f785ecdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5E 8992 bytes

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