Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b8ec21b4924186…

MALICIOUS

PDF

40.9 KB Created: 2020-04-02 12:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5e2fb0635ebf46e1530fb3c5ae1228a2 SHA-1: 9857dd9b3159d16f67893e19a334c0a4f19de2d2 SHA-256: 31b8ec21b49241868ff4ba6a27e6d6c231d6ae2a2fc987da842dcfef917bac40
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body itself is heavily obfuscated and contains metadata related to its creation, but the primary malicious activity is the mass of embedded URLs. 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://christinafriedle.org/uploads/1/3/0/3/130379145/130379145.html#the+english+patient+awards
    • http://devcaribe.com/uploads/1/3/0/5/130539728/zukomirisebi.pdf
    • http://pratthousedesign.com/uploads/1/3/0/2/130287445/fapajiz.pdf
    • http://buttonsaustralia.com/uploads/1/3/0/4/130489650/3b34c2.pdf
    • http://truetracktrailers.com/uploads/1/3/0/4/130490106/vaxupukogipakov.pdf
    • http://laurindajones.com/uploads/1/3/0/6/130621296/wigipuvonewovimezal.pdf
    • http://dolekemp.com/uploads/1/3/0/7/130776750/075823556b3.pdf
    • http://somersetbridlewood.com/uploads/1/3/0/7/130740401/62eec0.pdf
    • http://austindains.com/uploads/1/3/0/5/130550955/xonute.pdf
    • http://www.eltapancorusticfurniture.com/uploads/1/3/0/8/130874231/rerufamuxuzolomum.pdf
    • http://bcounted.net/uploads/1/3/0/2/130288427/3003835.pdf
    • http://citizensforpositivechange.org/uploads/1/3/0/6/130639263/9c0ebc8342c2.pdf
    • http://dorjeetseringnang.com/uploads/1/3/1/1/131164308/potuxoru.pdf
    • http://patternpod.com/uploads/1/3/0/6/130604903/2311516.pdf
    • http://michemediaa.com/uploads/1/3/0/6/130604788/soxiviwekowafel.pdf
    • http://santacruzishome.com/uploads/1/3/0/7/130740001/zisoneluveride.pdf
    • http://truckercoalition.org/uploads/1/3/0/7/130775286/2816678.pdf
    • http://supremepurchasing.com/uploads/1/3/0/3/130379058/vozekabot.pdf
    • http://vocalrevz.org/uploads/1/3/0/6/130639802/89738.pdf
    • http://lachlanswan.com/uploads/1/3/0/6/130639655/9f90ca569973.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_off00007528.bin
8b7a57e98b7a452c36bf36d0591848d88c796d36c15472fb85cd09dccb45bdff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7528 8888 bytes

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