Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e35df06b0b77168…

MALICIOUS

PDF

46.5 KB Created: 2020-03-11 14:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e33e6be87897f5c37189d3070d994ff9 SHA-1: d1d2077db9197021459d925629fba937b16a22d7 SHA-256: 9e35df06b0b77168b23471cf1b928a4d0354e01bdf6804ccb33e1cf041c656be
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though malformed, contains references to these external URLs, suggesting a link farm or SEO spam attack. 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://casey-family.rominastiebenphotography.com/uploads/1/3/0/5/130539049/130539049.html#renal+tubular+acidosis+proximal
    • http://akdlegal.com/uploads/1/3/0/4/130483354/zivekowex_faramizakiwaw.pdf
    • http://nybellhouse.com/uploads/1/3/0/7/130739488/pefaratirukugik.pdf
    • http://carlender.com.au/uploads/1/3/0/8/130815137/sebakivudoxuve_jakasem.pdf
    • http://ixayafoundation.org/uploads/1/3/0/2/130271030/zibidalig.pdf
    • http://www.mikeflattdesign.com/uploads/1/3/0/4/130476045/27eb89c0d25f54.pdf
    • http://scimedart.com/uploads/1/3/0/7/130740573/5a1c9de073f.pdf
    • http://katieshealthandbeauty.co.uk/uploads/1/3/0/6/130621277/zadotunus.pdf
    • http://www.locatemeasap.com/uploads/1/3/0/2/130270937/690d675a53d217.pdf
    • http://beeclubsales.net/uploads/1/3/0/7/130776821/893968.pdf
    • http://dfsheetmusic.com/uploads/1/3/0/5/130551475/kipakosuweg-lejiwuw-kaxetu.pdf
    • http://danniskloset.com/uploads/1/3/0/6/130620616/mimorepavipukibip.pdf
    • http://overstockoutletstlouis.com/uploads/1/3/0/5/130550955/8358542.pdf
    • http://jvwritingv2.club/uploads/1/3/0/6/130621214/binuwimagu-sitozuladopi.pdf
    • http://bjornarnemo.se/uploads/1/3/0/3/130379142/zoneko_fomezixifuwetaz_balowubozobu.pdf
    • http://jeremymichaelstone.com/uploads/1/3/0/4/130436181/a49ceefdb2f.pdf
    • http://www.scmproductsllc.com/uploads/1/3/0/4/130476866/xifapepixifepaxug.pdf
    • http://wattsdidierarchitects.com/uploads/1/3/0/6/130603834/geluzuzake-jodiwibomape-tifubojali.pdf
    • http://rollnrock.com/uploads/1/3/0/5/130551839/8d60ebffed58a5.pdf
    • http://theconnectionsacademy.net/uploads/1/3/0/7/130739087/biwijolokakevo-mezigowoz-bapajovogevag-takot.pdf
    • http://poffreevideolivechat.com/uploads/1/3/1/0/131070883/3422689.pdf
    • http://ged616modelsofinstruction.com/uploads/1/3/0/6/130604585/2623844.pdf
    • http://www.modernaestheticservices.com/uploads/1/3/0/5/130550706/daxagexo.pdf
    • http://mooretre.com/uploads/1/3/0/6/130604153/jesaluduzulu_mipulidi.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_off00008d69.bin
338b083d65dcf5fdf91baa5f28ae2eb2840fac2337f5760944592c071109f0e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D69 8000 bytes

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