Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a4e1e8bd351bef…

MALICIOUS

PDF

52.2 KB Created: 2020-04-10 01:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 88384b66af41b64333b0711171d0edaf SHA-1: 3cdfefc36352bd4a6262f274c5e4833b73cbc155 SHA-256: c7a4e1e8bd351befb941452ab9bf6d87ca90c246b5a0e21533d1c4fab00e17f1
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body explicitly mentions "Bihar stet computer science question paper pdf" to lure users. The embedded links are likely intended to redirect users to malicious content or phishing pages. No scripts were extracted from this sample.

Heuristics 3

  • 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
  • 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://myrajohnston1.com/uploads/1/3/1/6/131636678/131636678.html#bihar+stet+computer+science+question+paper+pdf
    • http://mamaligned.com/uploads/1/3/0/4/130488741/piforuvegoz.pdf
    • http://robinblisard.com/uploads/1/3/0/7/130740078/kesipo-batajirebezu-xewiso.pdf
    • http://michaelhughesfoundation.org/uploads/1/3/0/8/130874213/xababezomawediseluku.pdf
    • http://elevatedaspects.net/uploads/1/3/0/8/130813953/0ec28c5e04abdb2.pdf
    • http://lbi.rentals/uploads/1/3/0/6/130620371/puvenirivewi-jufumewonoxo.pdf
    • http://xclusiveeventsmanagement.com/uploads/1/3/0/3/130323161/jirujaxarajap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073ed.bin
c37833be639738774be0f4e09dba8568ed16ae82b9d5cc5a82af2db8bbcfbc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 8472 bytes
font_01_sfnt_off00009456.bin
1723f1ced37cc89d69e30f3df6281c5e5fb8989544fd4587aa75b00c91af2fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9456 1388 bytes
font_02_sfnt_off00009bbc.bin
20682fdb41b58ee71b641e3d542bb6957333ba9f96e1dfbef7b4f5241e91a030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBC 13844 bytes

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