Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce13332b9db5087…

MALICIOUS

PDF

41.9 KB Created: 2020-04-02 20:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c700f53278431c63c36324d7d55413a7 SHA-1: ed927d4676b3d4783372eb962c381613054551ba SHA-256: 0ce13332b9db5087e6b747e3c59956ee5912e3acd5250e0ba533f92515750050
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured to appear as user manuals or documents, indicating a link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports malicious intent. The document body, though partially corrupted, contains a URL that matches the pattern of the other extracted links.

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://mybarreluxe.com/uploads/1/3/0/8/130814462/130814462.html#bosch+wmv+2010+kullan%C4%B1m+klavuzu
    • http://hostmaster.firstsounds.com/uploads/1/3/0/4/130476395/siwunel.pdf
    • http://npcmutantmuscle.com/uploads/1/3/0/3/130313284/1d58cfc5d53.pdf
    • http://stjameslcms.org/uploads/1/3/0/6/130621131/funela-kowonaferu-kidix.pdf
    • http://thelaunchpadllc.com/uploads/1/3/0/6/130621185/munepovixonub_siluzabipolujuz_vebexipufupaw_tibolawexepufak.pdf
    • http://kingslancegames.com/uploads/1/3/1/0/131071021/fedezeputenigi.pdf
    • http://thewriteframeofmind.com/uploads/1/3/0/5/130540104/sagigij_wexipoteluze_gipit.pdf
    • http://lockpharmaceuticalconsulting.com/uploads/1/3/0/9/130969057/9212338.pdf
    • http://globalrecruitment247.com/uploads/1/3/0/7/130740192/pidune.pdf
    • http://westsideyogatherapy.com/uploads/1/3/0/3/130313152/vinadugefalip_nisex_gorow.pdf
    • http://aivopieru.com/uploads/1/3/0/9/130969889/3e281a9f.pdf
    • http://cbdmilwaukee.com/uploads/1/3/0/6/130622053/ba4d9d8a2.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_off000077c1.bin
8f7689a56029a021f453e91845f334ecb5f247324471992dfcd7368fc66ebd81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C1 9504 bytes

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