Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3dba8e338d5cb6f…

MALICIOUS

PDF

42.5 KB Created: 2020-03-29 07:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 727d3f68070cedc117c497191e0a2614 SHA-1: be537da04c5f57608bd84e07c20110a486bd500d SHA-256: f3dba8e338d5cb6f59226c5ba07ad89989f9ce04aded4a090b190d605fcef2c9
62 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to manipulate search engine results. The primary attack pattern involves luring users to these external resources, which could host further malware or phishing content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://74-123-73-159.mgwnet.com/uploads/1/3/1/3/131398188/131398188.html#agudas+llanas+y+esdrujulas+ejercicios+pdf
    • http://1169certified.info/uploads/1/3/0/5/130589381/6603592.pdf
    • http://clarkseedsllc.com/uploads/1/3/0/7/130739214/962343.pdf
    • http://stratdef.org/uploads/1/3/0/8/130814575/takupolida.pdf
    • http://jeffwhitingsolutions.com/uploads/1/3/0/9/130969763/foribukijedu.pdf
    • http://eyezonenv.net/uploads/1/3/0/2/130288893/sebusimaza_wagejofe.pdf
    • http://mjjam.net/uploads/1/3/0/5/130544067/9477066.pdf
    • http://more4lessoutlets.com/uploads/1/3/0/6/130604355/kafagevejimurun.pdf
    • http://provateknike.net/uploads/1/3/0/4/130483863/vitulisi.pdf
    • http://rtrassociates.net/uploads/1/3/0/5/130551464/lujalesevube-gumufadu-jafatojosutu.pdf
    • http://musiccitypetpartners.com/uploads/1/3/0/4/130488295/2766644.pdf
    • http://55florida.com/uploads/1/3/0/6/130605516/tixikijirupa-zobolevobebi-bexukolam.pdf
    • http://easlinstitute.org/uploads/1/3/1/0/131070317/b13bc75858d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643c.bin
9f3656b3a28f58eecfb7238539745de6887ea3893edd5b3dbab5a471df44343e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643C 9212 bytes
font_01_sfnt_off0000853a.bin
6f5589cf1763d9b30124e401b8407e77d4f7b0da0f268c3843f690d2cc1178e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853A 16168 bytes

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