Malicious PDF — malware analysis report

Static analysis result for SHA-256 83048071929ad07e…

MALICIOUS

PDF

38.5 KB Created: 2020-04-01 15:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 138a5cdf6b64368564334c77cc3a7b8a SHA-1: db7bd44147e0f27dd24572b5c058fd6fa96605a9 SHA-256: 83048071929ad07e6b5573cfd2c8ffa4bdc9de395cf677787c1048da75c2ab58
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents hosted on different domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm designed to direct users to potentially malicious content hosted on these external sites. No scripts were extracted from this sample.

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://onlypureessentials.net/uploads/1/3/0/5/130590596/130590596.html#the+expanse+novel+series+review
    • http://inamakafoundation.org/uploads/1/3/0/2/130289765/447b69212c.pdf
    • http://www.true9accessories.com/uploads/1/3/1/1/131164556/2528157.pdf
    • http://magnoliamarans.com/uploads/1/3/0/6/130640003/c12a0c0fe.pdf
    • http://kittar.ca/uploads/1/3/0/6/130603842/xulazamoge_taxazeb_borerogalabu.pdf
    • http://soundhealinglotusacademy.com/uploads/1/3/1/0/131070407/kozateb-mepegupadisopal-tinejuwer-tazuvipuko.pdf
    • http://fbgnaturalbabyshop.com/uploads/1/3/0/9/130969682/dilasupi.pdf
    • http://metcalfe4pa.org/uploads/1/3/1/1/131164002/7608047.pdf
    • http://startedtech.de/uploads/1/3/0/4/130435966/8dcdb4f.pdf
    • http://badjeeps.net/uploads/1/3/0/9/130969904/wikudixo-ribawetemebixo.pdf
    • http://taterre.com/uploads/1/3/0/7/130776725/923ed758dd4ae4.pdf
    • http://mail.chardontomorrow.org/uploads/1/3/1/4/131437254/gupabave-bumof-lopodu-netewe.pdf
    • http://sativic.com/uploads/1/3/0/5/130541208/3103731.pdf
    • http://goodmansinteriors.com/uploads/1/3/0/5/130588698/7092988.pdf
    • http://theshoeboxdxb.com/uploads/1/3/0/6/130620854/bidalinora_kinivazususase_rumavipivubore_xejotewolet.pdf
    • http://kvvkproduction.com/uploads/1/3/1/1/131163832/89c18.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_off00006d9d.bin
96fa124541418b334d56e7012c46f53a7fdcedae89d8686b0bc28dbf1ec12794		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9D 8152 bytes

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