Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39a1dacd96a2679…

MALICIOUS

PDF

46.5 KB Created: 2020-03-10 07:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 000020387ea456e1009102e8f20155ee SHA-1: 9fac7e591bddb3d16369f3b8e4a99e556a8b396b SHA-256: b39a1dacd96a2679735f7a3024695422635689cd25e30709fff0d5b4119f1996
92 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a link farm detection and an ML classifier. The document body contains a mix of garbled text and numerous external URLs, many of which point to PDF files hosted on unrelated domains. This suggests a tactic to manipulate search engine results or to distribute a large volume of potentially malicious content through a link farm. The primary intent appears to be directing users to a network of external resources rather than delivering a direct payload from the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://x0477123xstreamtravel.xsideas.com/uploads/1/3/0/6/130620973/130620973.html#pruebas+bioquimicas+de+identificacion+bacteriana
    • http://creepyfuckingstalker.com/uploads/1/3/0/3/130323141/7951446.pdf
    • http://lendamico.me/uploads/1/3/0/6/130604258/3335777.pdf
    • http://ipselite.com/uploads/1/3/0/3/130313090/023f7c81bf.pdf
    • http://ashleyjaynemeyers.com/uploads/1/3/0/7/130739530/2dc79b2e384.pdf
    • http://amdlifestylemgmt.com/uploads/1/3/0/6/130621331/75eb5c2ac508.pdf
    • http://theige.org/uploads/1/3/0/7/130740117/rotugibezu.pdf
    • http://mysmartteacher.com/uploads/1/3/0/4/130489742/2569987.pdf
    • http://www.ghosh-lab.com/uploads/1/3/0/6/130620892/lejafupapesizewexefo.pdf
    • http://webdisk.valleybookstore.com/uploads/1/3/0/3/130324092/6662052.pdf
    • http://mail.realsoapbydiana.com/uploads/1/3/0/2/130289467/880403fd94bbbca.pdf
    • http://code-camp.ru/uploads/1/3/0/2/130289508/98e85cc4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c45.bin
9a83e430c9d71a6a4bd491f19bf367a492a8a239be35636eee53d900b4037051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 9460 bytes
font_01_sfnt_off00008de5.bin
1110447959503c75238c0f1bcdf9de7fad567fc767730a4530dcb0d3a64541bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE5 2696 bytes
font_02_sfnt_off0000972f.bin
043f89cdc56a6d687dbde9ca708df5d68a479f0504edd5c2f1c61766139dec50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 10532 bytes

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