Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d855741de8f08e…

MALICIOUS

PDF

41.0 KB Created: 2020-03-25 12:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b822fd8c2e4474617a85c0b832bd01d4 SHA-1: c2bb75ad551971f6005077398c900896f0945399 SHA-256: c8d855741de8f08e519ab1c20860c3e3e9c938b423626d30622e766f25d8201c
92 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or link farms. The document body, though partially corrupted, contains text related to adjusting a Casio watch, suggesting a lure to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://referral360network.com/uploads/1/3/0/7/130776500/130776500.html#how+to+adjust+casio+wave+ceptor+watch+band
    • http://coastalchurchmaine.com/uploads/1/3/0/3/130313294/falot.pdf
    • http://events.lexingtonhistory.org/uploads/1/3/0/8/130813831/letimi-wupuz-karuteput.pdf
    • http://www.leveraanalytics.com/uploads/1/3/0/4/130476255/7eb4d77f8.pdf
    • http://miiasoey.com/uploads/1/3/0/6/130639423/nusuj.pdf
    • http://texasfundingsolutions.com/uploads/1/3/0/6/130639510/zibew-wekepudisirata-koxofiv-jazufeputipaval.pdf
    • http://lamusica-productions.com/uploads/1/3/0/6/130621425/diwuxirowosi.pdf
    • http://loudfitness1.com/uploads/1/3/0/3/130323972/vadudipajufo.pdf
    • http://georgemasonrw.com/uploads/1/3/0/8/130874012/warixomojulida_radimofamatok_zovila.pdf
    • http://arealpro.org/uploads/1/3/0/2/130272524/346eb3e0e1557.pdf
    • http://medikka.com/uploads/1/3/0/7/130740200/1aaaa59ae.pdf
    • http://www.breslovecards.com/uploads/1/3/1/0/131071113/donisugew.pdf
    • http://recallcathy.com/uploads/1/3/0/2/130289765/jenopoxuz_jibunulojakevuj.pdf
    • http://iatw.net/uploads/1/3/0/3/130313235/2661646.pdf
    • http://mx.hindtenterprises.com/uploads/1/3/0/2/130273872/pewofokujonawiwi.pdf
    • http://distancelearning-today.net/uploads/1/3/0/6/130604740/jufebivowa_gupitanalalib_pulileru_sulikud.pdf
    • http://wamits.com/uploads/1/3/0/2/130291575/7318290.pdf
    • http://jlomena.com/uploads/1/3/0/2/130288361/482830.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_off0000786b.bin
5ce5211ee037c0e5485a88d528b7e2e203028939b21f755ff227c0d8ffc8dccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x786B 7772 bytes

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