Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eae7ab61b69a733…

MALICIOUS

PDF

35.9 KB Created: 2020-05-19 06:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6730addbca8895e99c6985b602e4868 SHA-1: 95c7a5c13e2c32cc1b52f777265e0dc32cffef57 SHA-256: 8eae7ab61b69a7338986f97613de12d2e3cf8b514f9ba5f0d79c32f6f3bd4deb
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm designed to manipulate search engine rankings or redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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://viaed.com/uploads/1/3/1/3/131398133/131398133.html#dead+rising+4+trainer+fling
    • http://brenthrax.com/uploads/1/3/0/8/130874015/lixerer-vanetimumu-tajur-sonazisikerile.pdf
    • http://wisedetox.com/uploads/1/3/0/4/130488396/widovuzigov.pdf
    • http://aikidokenkyukaipennsylvania.org/uploads/1/3/0/8/130813694/7967199.pdf
    • http://dragonscalepublishing.com/uploads/1/3/0/4/130476499/xosuxawivuwili_zexojem.pdf
    • http://turnkeycompassion.com/uploads/1/3/0/5/130551089/2505674.pdf
    • http://correnovation.com/uploads/1/3/1/6/131607108/felis.pdf
    • http://dasilvadesignstudio.com/uploads/1/3/0/5/130539696/gutasarifudekas.pdf
    • http://clyft.se/uploads/1/3/0/7/130740556/1385ab2eeb3f6.pdf
    • http://betathetadelta.com/uploads/1/3/0/6/130620716/xezogegozuwapob_pavusetidub_mivotikubusa.pdf
    • http://uncagedbirdboutique.com/uploads/1/3/0/5/130588505/48947d89f.pdf
    • http://eibbedpadilla.com/uploads/1/3/1/0/131070314/biwituguwuwebimes.pdf
    • http://synergisticmovement.com/uploads/1/3/0/4/130489803/587603.pdf
    • http://ndtasanantonio.org/uploads/1/3/0/6/130620353/xavupakaradorizovoja.pdf
    • http://bcollinspropertyconsultants.com/uploads/1/3/0/3/130323631/goxusuvikajugo.pdf
    • http://dearcharlytravel.com/uploads/1/3/0/4/130478975/tufabuke.pdf
    • http://supersonalized.com/uploads/1/3/0/5/130590716/6722572.pdf
    • http://withlovencare247.com/uploads/1/3/0/8/130814279/vamalatarono.pdf
    • http://kitsap.dance/uploads/1/3/1/4/131406118/70ee7c5f6fdc09.pdf
    • http://tigressspecialtyprints.com/uploads/1/3/0/8/130814245/04a939c52.pdf
    • http://pinkertoninvestigations.com/uploads/1/3/0/4/130489102/cd3d68e.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_off00005f3c.bin
b4aba5f7f52983eed96dfcbfaa89f22fbf9a3d91065d917d9221ff0fc3fe613b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 10952 bytes