Malicious PDF — malware analysis report

Static analysis result for SHA-256 7797be59603936ca…

MALICIOUS

PDF

36.6 KB Created: 2020-05-18 19:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d12b5e42ba73ad906b6e830f434ea18e SHA-1: 089dfbe734372913ed6128ae1853ced5658646d1 SHA-256: 7797be59603936cac85a45f3988e9bed1126a267580874e3be24e22e740d2d49
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution network. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains some of the same URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://templestoweroofing.com/uploads/1/3/1/4/131437740/131437740.html#larousse+gastronomique+en+espa%25C3%25B1ol+epub
    • http://sparkleandsassonilne.com/uploads/1/3/0/5/130588201/8478372.pdf
    • http://mygetcashnow.com/uploads/1/3/1/1/131164519/fubumesabuditop.pdf
    • http://boulaywine.com/uploads/1/3/0/7/130739022/lalijuwetulatitebafo.pdf
    • http://mujereslunacreciente.com/uploads/1/3/1/1/131164297/vosakosuzidir_zunerala_wevasutunu.pdf
    • http://edengardencareportmacquarie.com/uploads/1/3/0/8/130874347/b7f26198a4327.pdf
    • http://labeljoep.nl/uploads/1/3/0/8/130813558/xisagebilu.pdf
    • http://saralacassephd.com/uploads/1/3/0/9/130969354/valazibixuzuje_javedabuteg_tufaxotin_waniboredube.pdf
    • http://alitqanest.com/uploads/1/3/1/4/131453559/25da809ec8.pdf
    • http://laurabarclay9.com/uploads/1/3/1/6/131607363/damekopebagikojavixu.pdf
    • http://themeltedjoy.shop/uploads/1/3/0/7/130739459/106da5e49b.pdf
    • http://marianswain.com/uploads/1/3/0/7/130739686/wopifilewor.pdf
    • http://partymoscato.com/uploads/1/3/0/4/130489523/8070514.pdf
    • http://prestandaconsulting.net/uploads/1/3/1/8/131856177/famito-makuvuzejuje-wuwesudujo-xizijo.pdf
    • http://kyahfuel.com/uploads/1/3/0/9/130969375/milusukamezokak.pdf
    • http://democratdesotofl.com/uploads/1/3/0/7/130774981/vopitoxugufebur.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd7.bin
6574058a49b6f54522439576924105334733325ee61e9023449f27e4eb2401fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 11236 bytes

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