Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7efcdbdb87ef6e…

MALICIOUS

PDF

38.2 KB Created: 2020-05-13 09:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 00b4fb9446fee9c382cddac64212ebbb SHA-1: bcf728ef9f73ec684e486097af1c7faf03738231 SHA-256: ac7efcdbdb87ef6e5e3d4ad2ebeaf3f78617c236270a42577f2e27d7c09a3d1e
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique commonly used for SEO manipulation or to distribute malicious content. The 'PDF_SEO_LINK_FARM' heuristic firing confirms this behavior, indicating the PDF is part of a link farm with 30 external PDF links. The ML classifier also strongly flagged this PDF as malicious. The document body itself is largely unreadable binary data, but the presence of numerous URLs suggests the primary function is to redirect users to other potentially harmful content.

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://vacuumexcavationsunlimited.com/uploads/1/3/0/6/130620936/130620936.html#adn+genes+y+cromosomas+pdf
    • http://collabor8.london/uploads/1/3/0/4/130483660/2adf477bc.pdf
    • http://anonymousbananapumkinspice101.com/uploads/1/3/1/6/131637035/kaforovalo.pdf
    • http://dirtyburke.com/uploads/1/3/0/2/130288909/8c9bcf0b52234.pdf
    • http://mbezmalinovicpsyd.com/uploads/1/3/0/5/130589277/ninokegijal.pdf
    • http://pnwvegchallenge.com/uploads/1/3/1/3/131384016/rizug.pdf
    • http://casasouthlight.com/uploads/1/3/1/4/131437931/netiwovojewoli.pdf
    • http://butlersemporium.net/uploads/1/3/0/5/130551324/d5bb558d23e8a4.pdf
    • http://findfastandbuy.com/uploads/1/3/0/6/130621276/d3883.pdf
    • http://weareradiantco.com/uploads/1/3/0/7/130739879/luxitajufu.pdf
    • http://sharonswaney.org/uploads/1/3/0/7/130775403/497140.pdf
    • http://annmareeshairsalon.com/uploads/1/3/1/4/131453414/rerupabumapaji.pdf
    • http://cjmotorsports.us/uploads/1/3/0/5/130589391/b173cbec9c5e92.pdf
    • http://seamistcollies.com/uploads/1/3/0/7/130739907/5fceaebf5a.pdf
    • http://mcadory.vet/uploads/1/3/1/3/131380438/693f9ee5.pdf
    • http://fccdiscipleship.org/uploads/1/3/0/4/130476565/suropesuked_madujalokajuxu_wolujamu_lalovubugodem.pdf
    • http://stanleyjordansalon.com/uploads/1/3/0/5/130540040/b534a3feea76d.pdf
    • http://uploadspeedtest.com/uploads/1/3/0/9/130968979/3234885.pdf
    • http://elliebrelis.com/uploads/1/3/0/4/130475997/tafonomana-najikivumazasaz-suleraxok.pdf
    • http://williambing.net/uploads/1/3/0/4/130489044/4049132.pdf
    • http://cynicalandsweet.com/uploads/1/3/1/6/131606480/097cb1393b34aa7.pdf
    • http://amzaloehealth.com/uploads/1/3/0/6/130639664/mevovisokafirevegu.pdf
    • http://marketing-for-yogis.com/uploads/1/3/0/5/130543106/polasapipexa_mikatowiru_rimowisefifuk_kaxuzupuzod.pdf
    • http://donaldvega.com/uploads/1/3/0/6/130620509/tigav.pdf
    • http://tailgategypsies.com/uploads/1/3/0/6/130603825/3541748.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_off00006915.bin
8a50432355d91aae74ca2b6b9673cb35ddf4c5d544c2654f9458db1eaab55c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6915 10352 bytes

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