Malicious PDF — malware analysis report

Static analysis result for SHA-256 5480e4bc00e73f3b…

MALICIOUS

PDF

35.1 KB Created: 2020-06-09 03:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f0d34b8902007f6d8acee6dc6055f8b SHA-1: 69bbd759ab27b680985bbdb53055f118bb4b6867 SHA-256: 5480e4bc00e73f3b4d09f9b2103837369ae962775b7c389678ad5e7076dc1452
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to other PDF documents hosted on various domains. This behavior is indicative of a link farm or SEO spam tactic, likely intended to drive traffic or potentially host malicious content. The document body text, though partially corrupted, includes references to academic subjects and software, suggesting a lure to appear legitimate. The primary attack pattern observed is the creation of a link farm to distribute traffic or potentially host further malicious content.

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://sydney.awrc.org.au/uploads/1/3/0/6/130604355/130604355.html#essentials+of+chemical+reaction+engineering+chegg
    • http://423.undesirable.us/uploads/1/3/1/1/131164007/xebutivukifo-pajokawasetukob.pdf
    • http://catfarm-studios.com/uploads/1/3/0/7/130739049/1156345.pdf
    • http://cordovatrust.com/uploads/1/3/0/7/130775228/zujaxogukumupesaduw.pdf
    • http://galaxypconline.com/uploads/1/3/0/4/130436288/voforozili-kofijeberoj-jikuxerogerir-manov.pdf
    • http://ghgwba.com/uploads/1/3/0/8/130873895/zatesojurix.pdf
    • http://hostmaster.equinetherapyservices.co.uk/uploads/1/3/0/5/130543552/japeni.pdf
    • http://east2westmedicine.com/uploads/1/3/0/8/130874260/2422189.pdf
    • http://silkaafifah.online/uploads/1/3/1/1/131164266/nivuxivuk.pdf
    • https://negoxojes.files.wordpress.com/2020/06/44171210607.pdf
    • https://gosuguwe.files.wordpress.com/2020/06/jebedodusigiburipitozegex.pdf
    • https://lugolasef.files.wordpress.com/2020/06/ruduzekenituzapedifu.pdf
    • https://mofebim.files.wordpress.com/2020/06/50826131463.pdf
    • https://neguraxopon.files.wordpress.com/2020/06/93920786421.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_off00005f48.bin
dc739aa661da00e83e605ab9a01f425f61ffcdd7199edeb3c3c94b5d9facf288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 9868 bytes

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