Malicious PDF — malware analysis report

Static analysis result for SHA-256 0026e2e5656923cd…

MALICIOUS

PDF

44.4 KB Created: 2020-03-20 02:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 352f89c66d4f76d0e45627265a51a61d SHA-1: 0b321d6b4cda78146d33024362d40e8ae8d8b488 SHA-256: 0026e2e5656923cd9db5d977eb02b9ad7c0586a57dc2ebe84f90feb0033abe48
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, many of which are dynamically generated and point to PDF files with numeric slugs, indicative of a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs suggest a redirection or download mechanism. 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://viperfisharts.info/uploads/1/3/1/1/131164446/131164446.html#media+desviacion+estandar+ejemplos
    • http://banchoryeastchurch.org/uploads/1/3/0/6/130639539/dajifosirepirisigisi.pdf
    • http://1lifeworthliving.com/uploads/1/3/0/2/130289272/xoxebubuv.pdf
    • http://trakket.com/uploads/1/3/0/5/130588343/mibupufolosa-birivomosa-pefitulo.pdf
    • http://foodallergytrainer.com/uploads/1/3/0/6/130639863/6140610.pdf
    • http://hoodieseason7.com/uploads/1/3/0/6/130605076/3449371.pdf
    • http://kpopgoods.ca/uploads/1/3/0/3/130313429/f959e9cb7adc.pdf
    • http://barteeranchllc.com/uploads/1/3/0/7/130775572/zidipiwukakowit-lotuxononitigel-xufeweviwoguzum.pdf
    • http://bioticbeginnings.com/uploads/1/3/0/7/130775985/dajimixiz.pdf
    • http://write-move.com/uploads/1/3/0/8/130814298/e4a694e88.pdf
    • http://drstellamedicalintuition.com/uploads/1/3/0/6/130639054/1a298b.pdf
    • http://giecorp.com/uploads/1/3/0/7/130775679/josuk.pdf
    • http://eastbrooklynhousing.com/uploads/1/3/0/7/130775516/dolaluparub-xadodawo.pdf
    • http://nienborg.com/uploads/1/3/0/8/130874050/fijojutebawuwo-fuzur.pdf
    • http://lilacs4daisies.com/uploads/1/3/0/6/130605291/veragexerotil_dexomipixobogaw_goberowemixewa_bedeten.pdf
    • http://kuchniaani.com/uploads/1/3/0/4/130488780/lanenekikipeder.pdf
    • http://calvarybconline.net/uploads/1/3/0/5/130551004/7415247.pdf
    • http://mta-sts.mx.nwrpdp.com/uploads/1/3/0/5/130551677/tilawosusew.pdf
    • http://www.bodyforbeing.com/uploads/1/3/0/7/130740556/b977d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000784c.bin
82700015235914e652191cbecdfaf9d6ace9c3faf6a0c3d4c458b7cf18e69c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784C 8788 bytes
font_01_sfnt_off00009815.bin
9d747930df910d1b16f6aeae13eefb5503aa50145f1894bb37f8e7b711430b52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9815 2856 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.