Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a62e280173263e6…

MALICIOUS

PDF

39.7 KB Created: 2020-03-16 08:03:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7b2d1b2ed5f496b3ec75ebc26c509c0c SHA-1: 83753d64020815294953de926a2a924ca3265106 SHA-256: 1a62e280173263e6ea2398cd20816098587fa06ee4a8b06644188b44d72b7244
62 Risk Score

Malware Insights

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

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 mentions "Arduino usb driver windows 7", likely a lure to encourage users to click on the embedded malicious URLs. The primary attack pattern involves redirecting users to potentially harmful content through these numerous links.

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://www.casacdeelectric.com/uploads/1/3/0/3/130323290/130323290.html#arduino+usb+driver++windows+7
    • http://beelbangerapost.com/uploads/1/3/0/3/130323109/5578260.pdf
    • http://www.frelsmusicstudio.com/uploads/1/3/0/7/130775358/kolamizezuge.pdf
    • http://www.flockbransonas.com/uploads/1/3/0/9/130969710/lirov.pdf
    • http://little-hugs.com/uploads/1/3/0/4/130436354/909faf93298460.pdf
    • http://bonitabonanza.com/uploads/1/3/0/6/130639400/607d64fd9c804.pdf
    • http://wcoem.net/uploads/1/3/0/2/130292148/f55d02a0ff5b.pdf
    • http://oisol.net/uploads/1/3/0/7/130740149/tasatujunusuza.pdf
    • http://wildernessroots.com/uploads/1/3/0/6/130605448/reduzupipije.pdf
    • http://starbucksfs.net/uploads/1/3/0/2/130272339/lubupaniladi_vozomozole_xepajuvenuravo_xoninapevafe.pdf
    • http://julianlieberman.com/uploads/1/3/0/7/130739684/mowixobosimotago.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_off00006467.bin
80b90af3817f123ba7591515aaafbc2c07c85064dc055a302987ece6935da906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6467 7996 bytes
font_01_sfnt_off00008347.bin
0a8651204712d77b3df8786b20c09d46779fa8f6890d30c9d9c12e9401afa574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8347 4152 bytes

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