Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd5121cc4224233…

MALICIOUS

PDF

40.3 KB Created: 2020-04-02 21:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5fa5d0fe6b7b9853d1c28424f890e53b SHA-1: 25db83c7a41068e0aa3a64d75bc1e766cfdbf010 SHA-256: fbd5121cc4224233b24785acc5b108365915bf3660adc4bbf543be947751fdff
70 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, many of which point to other PDF files hosted on unrelated domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content through a series of redirects. The document body, though partially corrupted, contains text related to construction estimating, likely serving as a lure to encourage downloads.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://needfulwears.com/uploads/1/3/1/4/131483053/131483053.html#estimating+in+building+construction+eighth+edition+pdf
    • http://determinedtolearn.net/uploads/1/3/1/3/131379808/51c207.pdf
    • http://samcorp.net/uploads/1/3/0/5/130540083/1873661.pdf
    • http://thecoppertreeco.com/uploads/1/3/0/5/130551083/tulixizutowew_jifupib_gatirozav_jegalel.pdf
    • http://drysocketsolution.net/uploads/1/3/0/6/130621066/daxigilawo-nejud-vuwibules-zulabagexarovoj.pdf
    • http://firstdirectfinancial.info/uploads/1/3/0/7/130775144/8678573.pdf
    • http://sheffieldscienceinpolicy.com/uploads/1/3/0/8/130874217/6ec561.pdf
    • http://cjvalle.com/uploads/1/3/0/8/130814339/salogofuzir.pdf
    • http://pinkmisha.com/uploads/1/3/0/8/130814805/34c14f4e604.pdf
    • http://lincolnpitcher.com/uploads/1/3/0/7/130740367/4531278.pdf
    • http://elliehackney.com/uploads/1/3/0/5/130588554/708255.pdf
    • http://artfullofjoy.com/uploads/1/3/1/3/131380236/09eae50d9c.pdf
    • http://teslawirelessenergy.com/uploads/1/3/0/5/130551049/d7006d3cd47.pdf
    • http://fatwoodexpress.com/uploads/1/3/0/7/130740124/8025746.pdf
    • http://northcoastoutfittershunting.com/uploads/1/3/1/1/131164573/gusex_texigoxamu_badovosorem_fagevusero.pdf
    • http://lore-residency.com/uploads/1/3/0/6/130639916/vefuzi_lolesa_xuzubevised_nonuzo.pdf
    • http://houstonstumpremoval.net/uploads/1/3/0/2/130288444/wipatene_xolaterotabe.pdf
    • http://www.ericfairlayman.com/uploads/1/3/0/7/130775507/4783172.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_off0000739d.bin
9ee2a86c9ffb52c680351c953911f1999788d066ed16ac5c82f004d062ee571e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 8264 bytes

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