Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ab346be22e88b8…

MALICIOUS

PDF

49.8 KB Created: 2020-03-29 14:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c18edda3fc218cfab45dc208ddd802bd SHA-1: 2b1da6ae641fbdd3dba2ec6d17f5df77753cf7b5 SHA-256: d7ab346be22e88b8e905efb95d51aba17063a4f2c1e6eec6e15b76abbafcb1fe
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. The primary lure is a free digital marketing course, which is likely a pretext to drive traffic to malicious or compromised websites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs supports this assessment.

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://westcoastretractablescreens.net/uploads/1/3/0/8/130874592/130874592.html#marketing+digital+curso+gratuito+online
    • http://motherhenmusic.org/uploads/1/3/0/3/130323250/wezuzudixexala.pdf
    • http://cannelle-communication.fr/uploads/1/3/0/2/130273983/39e5689fbe.pdf
    • http://ready-set-speak.com/uploads/1/3/0/7/130739155/govak.pdf
    • http://easyfreightsolutions.com/uploads/1/3/0/6/130639648/jetibatuwa.pdf
    • http://cosmichumanbeing.com/uploads/1/3/1/0/131070246/kelolarabep-pidoruwotemazo-lafewufanuzivu.pdf
    • http://queensroadcbd.com/uploads/1/3/0/3/130313320/1864b518ce3.pdf
    • http://tau.gent/uploads/1/3/0/3/130379488/8e26ac8726.pdf
    • http://tecsumin.com/uploads/1/3/0/7/130740128/5214954.pdf
    • http://krtfilms.com/uploads/1/3/0/6/130621852/9122043.pdf
    • http://ktsuyukusa.com/uploads/1/3/0/4/130475965/kegibokozujov.pdf
    • http://stevenmelhomes.com/uploads/1/3/0/5/130551720/jufotalox.pdf
    • http://teammba904.com/uploads/1/3/0/5/130588989/1994916.pdf
    • http://cultclassicsstudios.com/uploads/1/3/0/6/130639227/mejogide_namepugut_wujitelave.pdf
    • http://trentesi.com/uploads/1/3/0/7/130775277/ganos.pdf
    • http://hmckinney.com/uploads/1/3/0/6/130604145/a8887b7e.pdf
    • http://athensinfosec.com/uploads/1/3/0/3/130313436/885517.pdf
    • http://fancibaking.com/uploads/1/3/0/8/130814010/sedusojene.pdf
    • http://ashtonwoodsu.com/uploads/1/3/0/6/130621901/kixulop_ligimedumipa_vipefununido.pdf
    • http://gotucov.com/uploads/1/3/0/7/130739769/4234232.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_off00007db2.bin
3d01c48f35a17613e22eb3294a9655182f79718ceefef66a5d9bb6a71fbe24d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB2 11756 bytes
font_01_sfnt_off0000a302.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA302 16036 bytes

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