Malicious PDF — malware analysis report

Static analysis result for SHA-256 83140df26fa5eb82…

MALICIOUS

PDF

38.6 KB Created: 2020-03-20 07:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd5f42fdab7f780dee272782ec57fca6 SHA-1: f9d2c594b071d5a0d4f3c71c2d2b4dd561ee82e4 SHA-256: 83140df26fa5eb82985e8512939e88f0fe5277f0f2003bbf70b58c76ec25713e
94 Risk Score

Malware Insights

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

The PDF file 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 redirection scheme. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to a network of potentially malicious websites.

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://completeimage.net/uploads/1/3/0/5/130589295/130589295.html#tipos+de+la+administracion+publica
    • http://hypebaysg.com/uploads/1/3/0/5/130589219/31a5f7292e5f.pdf
    • http://www.progressivepsychologicalservices.com/uploads/1/3/0/3/130379504/fudokofulorod_rivut.pdf
    • http://www.salonbusinessowners.com/uploads/1/3/0/5/130539251/3680608.pdf
    • http://apexpeoguide.com/uploads/1/3/1/0/131069819/buserebefijedabe.pdf
    • http://hollandghanaplatform.net/uploads/1/3/0/6/130604040/porigit.pdf
    • http://barnwoodbilliards.com/uploads/1/3/0/7/130740128/1a16adabba.pdf
    • http://dia-taylor.com/uploads/1/3/0/3/130323329/6652348.pdf
    • http://njgraniteconstruction.com/uploads/1/3/0/2/130289310/nuvabotesuxaf.pdf
    • http://ateenagescrewup.net/uploads/1/3/0/6/130604368/lajiwapolijirofenel.pdf
    • http://mail.eversouthbakes.com/uploads/1/3/0/3/130323631/5529389.pdf
    • http://ifocused.org/uploads/1/3/0/7/130775144/gulanemujaduxib-zotivagabo-gixipopozimibum-sumepimurosular.pdf
    • http://74-123-72-210.mgwnet.com/uploads/1/3/0/6/130640039/7044213.pdf
    • http://debbybolandwatt.net/uploads/1/3/0/7/130738984/momafener-pozetakil-niditanoj.pdf
    • http://www.c3industriesllc.com/uploads/1/3/0/2/130272070/xugidutuxomok_javuvuzaselaxox_jesuxagiwosiz.pdf
    • http://mta-sts.mail.hoernli-hemberg.ch/uploads/1/3/0/5/130545249/952c895e44d7b.pdf
    • http://www.astrologicalinsightsonline.com/uploads/1/3/0/5/130588173/berugupimo-wijazamef.pdf
    • http://reveriecoffeeco.com/uploads/1/3/0/4/130488157/dugojafufibadow_damanafibotulo_jifanosepusozur_nexaj.pdf
    • http://aandeapothecary.com/uploads/1/3/0/6/130620874/xepazuvegoludiruv.pdf
    • http://newconstructionchicago.com/uploads/1/3/0/7/130739087/1979007.pdf
    • http://lotkgyl.sites.looka.com/uploads/1/3/0/2/130270826/juwubanogunusolonun.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_off00006fc6.bin
34ec9280ab1b315c2eaa60a54d75441b9f25e9a41c25a742e1285a9a7e4fef5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC6 7412 bytes

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