Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce59841c17ffb12…

MALICIOUS

PDF

36.3 KB Created: 2020-05-25 21:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a3a09b623045fe3b1432a984765eaa SHA-1: 03c0da9fb7559165178185db15de85f3cea17c1b SHA-256: cce59841c17ffb1280f98e67cf4f001f744298e6994788ef4a87c98ceb60bf5d
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body itself is largely unreadable, but the presence of numerous URLs pointing to domains with numeric or generic names suggests a link farm or redirection scheme. 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://mylocalcfo.gammaxiques.org/uploads/1/3/0/2/130289186/130289186.html#obstetrics+and+gynecology+beckmann+8
    • http://christinawinslow.org/uploads/1/3/0/7/130739072/nurikikokaxulo.pdf
    • http://sptsairplay.com/uploads/1/3/1/4/131437980/4023665.pdf
    • http://thelinehandbtinstitute.org/uploads/1/3/1/4/131453230/wagurowovep.pdf
    • http://coopersdieselsolutions.com/uploads/1/3/1/3/131398412/ropirapapilet.pdf
    • http://gduhe.org/uploads/1/3/1/4/131406843/71954f7.pdf
    • http://4qn.undesirable.us/uploads/1/3/0/8/130814515/badurogi-dudibadogejadu.pdf
    • http://cryptoshub.com/uploads/1/3/0/3/130379818/zewuserejuxe-bibaxagukux.pdf
    • http://bgwooddesign.com/uploads/1/3/1/1/131164204/nurepofajar.pdf
    • http://schoren.ch/uploads/1/3/0/6/130621852/046ec7ec.pdf
    • http://mygypsyrootscatering.com/uploads/1/3/0/6/130640061/fimumaxajit.pdf
    • http://patricksolomon.org/uploads/1/3/1/4/131453919/fuxoputiro_xusosubuli_zirumijanige.pdf
    • http://colorado-es.com/uploads/1/3/1/6/131606491/08ec3.pdf
    • http://bienes-silverado.com/uploads/1/3/1/4/131437363/fijuretobaj.pdf
    • http://ronsbest.org/uploads/1/3/0/7/130739290/8721285.pdf
    • http://theelegantmaid.net/uploads/1/3/0/7/130776394/nijino-suxilol-faparuduwi.pdf
    • http://zestyzebraonline.com/uploads/1/3/1/3/131383928/7072000.pdf
    • http://cfinedesign.com/uploads/1/3/0/5/130540453/dbf8d3a46c9.pdf
    • http://lenlamensdorf.net/uploads/1/3/0/6/130640029/5493813.pdf
    • http://mjforwardbuild.net/uploads/1/3/0/6/130620604/fivaribe.pdf
    • http://samschmitt.ca/uploads/1/3/0/5/130551641/sevogepefo.pdf
    • http://northshoreresidentialma.com/uploads/1/3/1/0/131070306/wovumukewolajek.pdf
    • http://devauzet.de/uploads/1/3/1/1/131164402/mavuz-zigapiros-dulevefijoti.pdf
    • http://pinevillegardenclub.com/uploads/1/3/0/6/130621940/pulup.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_off00006254.bin
206780f21d970f67282f4508473caf87b0dca4fc5124871ca3fbe89a669c2afc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6254 10064 bytes

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