Malicious PDF — malware analysis report

Static analysis result for SHA-256 c731fc5d3a72c189…

MALICIOUS

PDF

40.9 KB Created: 2020-04-21 09:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 75c8fd03b7da71af7be041819a8f901b SHA-1: 64856477429f2cdd6e338ad08b05060facb35262 SHA-256: c731fc5d3a72c1898ce32bb940a5c7aea2bbcc9c56f23a0d94650c03e169a317
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Gym training app android' and references the wkhtmltopdf tool, suggesting a lure. The primary heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, with 'http://ssmanning.com/uploads/1/3/0/8/130813639/tizobi.pdf' being the first identified. Another heuristic, 'PDF_URI', points to 'http://murraywhiteley.com/uploads/1/3/1/3/131379274/131379274.html#gym+training+app+android'. These links likely serve as the initial stage for a phishing or malware delivery campaign.

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://murraywhiteley.com/uploads/1/3/1/3/131379274/131379274.html#gym+training+app+android
    • http://ssmanning.com/uploads/1/3/0/8/130813639/tizobi.pdf
    • http://galseyasociados.com/uploads/1/3/0/5/130544313/9835f700fb8df.pdf
    • http://viennaseminars.com/uploads/1/3/0/7/130776841/girufogij.pdf
    • http://larajackson.com/uploads/1/3/0/3/130379094/xizidebitavum.pdf
    • http://keepemcovered1gmail.com/uploads/1/3/1/4/131406960/vimunavaluviro.pdf
    • http://shadowgangs.com/uploads/1/3/1/3/131378821/7155515.pdf
    • http://jhenrynotes.com/uploads/1/3/1/4/131452743/8607460.pdf
    • http://cortneycunningham.com/uploads/1/3/0/5/130590122/xezovagapifol.pdf
    • http://archimmo.ca/uploads/1/3/1/4/131452958/pexazigojab.pdf
    • http://foundryarc.com/uploads/1/3/0/5/130590462/9a6815.pdf
    • http://paladinglobalmarket.com/uploads/1/3/0/3/130313230/digefumizodiv.pdf
    • http://debbiemmartinez.com/uploads/1/3/0/6/130640229/5452186.pdf
    • http://dallas-hair-makeup.com/uploads/1/3/0/8/130874309/vuzaje_desolu_fawubijanem_savis.pdf
    • http://texsunwindowtint.com/uploads/1/3/1/3/131383383/5806aee6580.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_off0000651e.bin
0e421ddb420c5c1b3e59687691b8791b9178d16a8e6ea9026278f35806620755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 7444 bytes
font_01_sfnt_off00008276.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8276 16036 bytes

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