Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc2f04606ca71bc…

MALICIOUS

PDF

38.7 KB Created: 2020-03-14 22:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3040e5bc4b97703e8dc611bb71211a4b SHA-1: 94afa0556dfa0f2adb08b212a1faad97df743cd1 SHA-256: cbc2f04606ca71bc0cf50d1862dc0c4ff5ae64b25341acd8e46715175dc15480
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains that appear to be part of a link farm. The ML classifier strongly indicated maliciousness. The document body, though malformed, contains references to URLs that are likely used to redirect users to malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://x0065289xstreamtravel.xsideas.com/uploads/1/3/0/6/130639273/130639273.html#phase+5+phonics+split+digraph+worksheets
    • http://jessicawcheung.com/uploads/1/3/0/5/130588951/f9d7a.pdf
    • http://www.sarahzahm.com/uploads/1/3/0/5/130542982/194104.pdf
    • http://nicolecthomaswrites.com/uploads/1/3/0/3/130323337/vesuxarigonifejabibu.pdf
    • http://74-123-75-212.mgwnet.com/uploads/1/3/0/3/130379529/xedosiwuw.pdf
    • http://74-123-79-186.mgwnet.com/uploads/1/3/0/6/130639524/9385637.pdf
    • http://mommaonline.org/uploads/1/3/0/6/130621874/ee75b102.pdf
    • http://paintingsbygigi.com/uploads/1/3/0/7/130776399/6154b841e089ee.pdf
    • http://www.goldtimeradio.net/uploads/1/3/0/6/130639021/fowadenov_xawatelena.pdf
    • http://shaeandkay.com/uploads/1/3/0/7/130739192/bokoperi.pdf
    • http://whoneedsboobsanyway.com/uploads/1/3/0/9/130969878/tuvemevibe.pdf
    • http://russianboutique.co.uk/uploads/1/3/0/7/130739163/tariluzaba.pdf
    • http://www.crownmountain.net/uploads/1/3/0/6/130604046/66a26cb3f.pdf
    • http://ryancoulteryoga.com/uploads/1/3/0/5/130551457/zisogerinolamifator.pdf
    • http://radio91.net/uploads/1/3/0/2/130270895/6d4deef9cfc74.pdf
    • http://drummersanonymous.net/uploads/1/3/0/2/130288542/sotadamuv.pdf
    • http://www.mhescorts.com/uploads/1/3/0/7/130776519/08d93625ba83.pdf
    • http://prabhbroker.com/uploads/1/3/0/5/130551824/6115198.pdf
    • http://livinunderconstruction.com/uploads/1/3/0/6/130621349/webuxalukabexe_dudebopixemuza_tanopijulevawa_xerunofusupita.pdf
    • http://bcproductdeals.com/uploads/1/3/0/6/130620345/pevolozafasin.pdf
    • http://francinebeaudin.com/uploads/1/3/0/6/130621455/630367.pdf
    • http://parmajacos.com/uploads/1/3/0/2/130289244/5184256.pdf
    • http://coolbreezecloud.com/uploads/1/3/0/5/130588810/049b049d.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_off00006de6.bin
e57691a451b42f1340e8b2ddc9c915d5c46a22a8379af60241b99b1468e3eb7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE6 8084 bytes

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