Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9a259b3c7eb7d6…

MALICIOUS

PDF

86.2 KB Created: 2020-03-15 15:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: b2c703aa8425fb956efa3da8372c3b27 SHA-1: 09bf752ec37b8ea9da358ac9de8707a380c069d0 SHA-256: 7c9a259b3c7eb7d63fa8e1bef098a2c9fc642d2d38de4afc90a34ea03cd4e3f6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious SEO or redirection scheme. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a malicious document, likely intended to direct users to potentially harmful content or further stages of an attack.

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://www.gildercollegeconsulting.org/uploads/1/3/0/5/130588784/130588784.html#accolade+sentence+formation PDF link annotation
    • http://l3games.net/uploads/1/3/0/5/130588983/dozapuf-rariwodaxa.pdfIn PDF document text
    • http://wehaveyoursign.com/uploads/1/3/0/9/130969176/6dcce.pdfIn PDF document text
    • http://leahmillerfreeman.com/uploads/1/3/0/6/130639865/2977934.pdfIn PDF document text
    • http://mta-sts.crisisresidentialnetwork.com/uploads/1/3/0/2/130272575/4783600.pdfIn PDF document text
    • http://oversiteproductions.com/uploads/1/3/0/6/130604315/jupop-lerovu-xajof.pdfIn PDF document text
    • http://arsenalautodetailing.com/uploads/1/3/0/6/130640214/xojobivevexu.pdfIn PDF document text
    • http://www.summerhouselavender.com/uploads/1/3/0/6/130621361/4797.pdfIn PDF document text
    • http://www.withoutstreaks.co.uk/uploads/1/3/0/6/130621751/bipuderita.pdfIn PDF document text
    • http://buildsolutionz.com/uploads/1/3/0/6/130639476/192ebe0a78147ea.pdfIn PDF document text
    • http://www.wetislandadventures.com/uploads/1/3/0/7/130740387/mezufefosa-mileragaxor-melelesapusoxi-wevuximamevipo.pdfIn PDF document text
    • http://fitnowgal.com/uploads/1/3/0/2/130289569/784936.pdfIn PDF document text
    • http://ncmusictherapy.org/uploads/1/3/0/4/130476859/579865a.pdfIn PDF document text
    • http://bearsvsbabies.org/uploads/1/3/0/2/130271240/pugenomonuzijozale.pdfIn PDF document text
    • http://mycommentsandthoughts.com/uploads/1/3/0/6/130605280/parevivego.pdfIn PDF document text
    • http://bigdeltasystems.com/uploads/1/3/0/9/130969631/vefaxelibori-divimez.pdfIn PDF document text
    • http://juxtaprose.net/uploads/1/3/0/7/130740550/tujezuboj.pdfIn PDF document text
    • http://znbassets.com/uploads/1/3/0/4/130488691/7e614ac5e36b83.pdfIn PDF document text
    • http://maddieblairpersonaltraining.com/uploads/1/3/0/5/130551266/numetogalulufolar.pdfIn PDF document text
    • http://gcbuilders.net/uploads/1/3/0/6/130604706/tovewig.pdfIn PDF document text
    • http://morganneason.com/uploads/1/3/0/6/130621649/ralufozoju.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E4 8764 bytes
SHA-256: 4966a06286ad8160661c08d7324140a82eca2180d973921f8f005f7b2ba3bc1f

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