Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be18f3e500a2b89…

MALICIOUS

PDF

29.1 KB Created: 2020-05-16 16:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 151141bcb71030d30130739eb26f0afc SHA-1: f2c1d0000160b4123819acd99dce0c00a1fb0600 SHA-256: 0be18f3e500a2b890278bcddb596b7992cc0d0a646e7662e2d7580ab8b21a5ad
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body text is minimal and appears to be obfuscated or corrupted, but the presence of numerous URLs suggests a malicious intent, possibly for SEO spam or to redirect users to malicious sites. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://esotericpublications.com/uploads/1/3/0/8/130874086/130874086.html#abcd+2+vande+mataram+dance+video
    • http://vesselhouse.co/uploads/1/3/0/3/130312991/ravewenokil.pdf
    • http://mediationhubkenya.org/uploads/1/3/1/6/131637178/xidoketegala.pdf
    • http://jamesboppsalon.com/uploads/1/3/0/8/130873818/3022035.pdf
    • http://castellanoart.net/uploads/1/3/1/3/131379409/nazowujudewi.pdf
    • http://aasuamovingforward.com/uploads/1/3/1/6/131637016/wubujo_fixibolopateza.pdf
    • http://franklinranchevents.com/uploads/1/3/0/2/130287266/2751692.pdf
    • http://amb-webforce.com/uploads/1/3/0/2/130291561/jaguzefiwu.pdf
    • http://charitybasketballgame.org/uploads/1/3/0/8/130813427/fipan-kurexovipa-fiper.pdf
    • http://harrelsonmech.com/uploads/1/3/0/6/130621052/nakerajugewilipala.pdf
    • http://badgerlift.com/uploads/1/3/0/7/130738824/9647467.pdf
    • http://partsboss514.com/uploads/1/3/0/6/130639481/gumamuziku-pamaruloku-matebo-nipozas.pdf
    • http://stephanielacapra.com/uploads/1/3/1/6/131606025/2581758.pdf
    • http://tuckerlevinpllc.com/uploads/1/3/0/8/130813651/6945630.pdf
    • http://affordableprobuilders.com/uploads/1/3/0/7/130739192/wuwuxesapimavin.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_off000048ae.bin
8534b67d648cadafc231238396f0a088a6aebf860f0daf31f7f733b7395be8a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48AE 9468 bytes

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