Malicious PDF — malware analysis report

Static analysis result for SHA-256 e850f7aa2593e577…

MALICIOUS

PDF

49.2 KB Created: 2020-03-09 04:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5c1eafd110137417b4e8cc22510dac35 SHA-1: 4f92a54a126dab0278134ca2595ef947e62ce4ac SHA-256: e850f7aa2593e5773701cb2f490ee07c273febbb2f4a4760b395b03850785de7
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious payloads. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a mass of external PDF links generated to lure users. The document body, though partially corrupted, contains references to compiler design and application metadata, but the primary malicious intent appears to be the distribution of 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.oakridgevillage.net/uploads/1/3/0/3/130324288/130324288.html#bottom+up+parsing+in+compiler+design
    • http://mesmerdeleault.com/uploads/1/3/0/7/130739001/315d49a.pdf
    • http://www.archetypedesignstudios.com.au/uploads/1/3/0/6/130620490/javusixudiwovezitup.pdf
    • http://4rdevelopments.com/uploads/1/3/0/4/130489253/wisajoz.pdf
    • http://dermascapes.com/uploads/1/3/0/6/130639558/xugugamapuw.pdf
    • http://therejuvenationplace-blackfriday.shop/uploads/1/3/0/4/130483583/wivok_dubate_joduwexatukew.pdf
    • http://levelofourtimes.org/uploads/1/3/0/5/130539218/tefizuzadefuw-lepopuretasom.pdf
    • http://www.pst.com.co/uploads/1/3/0/6/130603756/3792618.pdf
    • http://www.wearehereactors.com/uploads/1/3/0/5/130539458/xenoxereluvilete.pdf
    • http://hostmaster.apellesschilderwerken.nl/uploads/1/3/0/6/130621836/5d5869dc.pdf
    • http://mediationhunters.com/uploads/1/3/0/3/130323520/8935719.pdf
    • http://notanotherpotcast.net/uploads/1/3/0/6/130621838/449a5152ffe98.pdf
    • http://mole-man.co.uk/uploads/1/3/0/5/130550693/tozibapozarimu.pdf
    • http://risingskyproductions.com/uploads/1/3/0/4/130488736/bbf83b.pdf
    • http://www.stacyshirk.com/uploads/1/3/0/5/130539672/f5ce4dbf318a.pdf
    • http://celinemramsingh.com/uploads/1/3/0/4/130483422/lexeveji_pijasa_xeputovevurefe_nekid.pdf
    • http://webmail.hawkmcintyre.com/uploads/1/3/0/9/130969937/doxos-zinarisojez.pdf
    • http://diversityinarchitecture.org/uploads/1/3/0/4/130478760/kojuneso.pdf
    • http://nicklasbakedgoods.com/uploads/1/3/0/3/130379740/c9a5b.pdf
    • http://odessawaterwell.com/uploads/1/3/0/5/130551567/vevasoweda.pdf
    • http://root.lagarrigue.co.uk/uploads/1/3/0/3/130323291/5438489.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_off00008a99.bin
382cbf2e63bb9ea80ef25e6cfc09eb0ade4239cc9d3d6866befe7047e64c9a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A99 8856 bytes
font_01_sfnt_off0000ac97.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC97 2864 bytes

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