Malicious PDF — malware analysis report

Static analysis result for SHA-256 18be1c1ec2fe577c…

MALICIOUS

PDF

38.6 KB Created: 2020-03-06 16:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 067c28eee922451efd1fc50273406d57 SHA-1: 0ad408cee8b814938cab46839434daabec60ebea SHA-256: 18be1c1ec2fe577ce0025964a1e944866d9fe23fcea365e2774b700b577b19f4
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also strongly indicated maliciousness. The embedded URLs likely lead to further malicious content or phishing pages.

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://huangguanzuqiukaihuwang.br3h.com/uploads/1/3/0/9/130969504/130969504.html#why+csma+cd+is+not+used+in+gigabit+ethernet
    • http://dogsrulesj.com/uploads/1/3/0/6/130604140/cd27f6dc5d3.pdf
    • http://kalynfineart.com/uploads/1/3/0/6/130621683/nupozerek_togavavotiwe.pdf
    • http://lasliben.store/uploads/1/3/0/7/130740060/jemavafiko.pdf
    • http://remarkablepropertyservicesllc.com/uploads/1/3/0/4/130435726/bilixewejoxikun_xugajo_foxubida.pdf
    • http://adentarussia.com/uploads/1/3/0/4/130476751/vumupefojen_fasafewe_bixawa.pdf
    • http://abesoutfitters.com/uploads/1/3/0/4/130476678/wididiboligegoz.pdf
    • http://thunderbirdsprings.com/uploads/1/3/0/7/130775123/nuxenepiwal.pdf
    • http://militarybibleassociation.com/uploads/1/3/0/6/130639054/lutazuw_novapimaviko.pdf
    • http://bryantierney.com/uploads/1/3/0/5/130550920/3bab1.pdf
    • http://pauleast.biz/uploads/1/3/0/6/130604040/zovuvafaba.pdf
    • http://www.silverbackphysical.com/uploads/1/3/0/6/130621708/duferelula_topitodedeni_kaseg_zezutimixugap.pdf
    • http://www.amberclements.com/uploads/1/3/0/5/130588878/fd4900c54202f9.pdf
    • http://douglassherrera.com/uploads/1/3/0/4/130490218/vitedep.pdf
    • http://kaleidoscoperecords.net/uploads/1/3/0/8/130874316/wagajolerunigon-ximebixom-wujosebuv-xetezim.pdf
    • http://www.patriziavillafiori.com/uploads/1/3/1/0/131069910/sukasedolixadof.pdf
    • http://elcaminante.net/uploads/1/3/0/2/130272921/8bd2fe.pdf
    • http://feezell.org/uploads/1/3/0/6/130639990/52aabeae.pdf
    • http://www.thejrummer.com/uploads/1/3/0/6/130604255/2b82798.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_off00006df8.bin
2a021e1d3cf0cceedc4e6072033659ca4ab0f5a925831581a8e1815c074f6ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF8 7908 bytes

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