Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef42964b5a69442…

MALICIOUS

PDF

49.2 KB Authoring application: pstoedit
MD5: 32337db86bb22ca2a2370a607d707eb2 SHA-1: 071818d7f93e28d872ce27fa071b11dd4f8b1766 SHA-256: 9ef42964b5a694427ae0a7c93c2cf241b1187219b88542eebe77f01199e81630
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly support the malicious verdict. No scripts were extracted, and the document body was heavily obfuscated and truncated, preventing a more detailed analysis of the immediate user-facing content.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://bostercastle.com/uploads/1/3/0/7/130739132/numejagosimirefubug.pdf
    • http://sarawiseman.org/uploads/1/3/0/4/130476065/fifaju.pdf
    • http://michaelgrew.net/uploads/1/3/0/5/130550997/vevavizekunukemeti.pdf
    • http://privettartgallery.net/uploads/1/3/0/6/130604700/raxuj.pdf
    • http://texas2stepfilm.com/uploads/1/3/0/5/130588724/f58f29f96d76.pdf
    • http://bullfrogimaging.com/uploads/1/3/0/7/130776619/ketakugum-fezenojuwewuj-vadakurezejuzir-vereniziv.pdf
    • http://betterwebmail.com/uploads/1/3/0/2/130287937/9283989.pdf
    • http://abrolhoslandscaping.com.au/uploads/1/3/0/5/130551518/7723603.pdf
    • http://caraccidentslawyer.com/uploads/1/3/0/5/130539225/rekaronamifu_tisitiwe.pdf
    • http://brianhaggard.com/uploads/1/3/0/3/130313585/duwalulevu_garivevutafafap_folamelekefi.pdf
    • http://friendsofbcwildsalmon.com/uploads/1/3/0/5/130546244/2478083.pdf
    • http://5dsottozero.com/uploads/1/3/0/4/130435578/pomodixexubime.pdf
    • http://bokobowls.com/uploads/1/3/0/2/130289508/riluratamo_xikanisegu.pdf
    • http://mrcrosbyswebsite.com/uploads/1/3/0/4/130488165/9a90d.pdf
    • http://dutchgrows.com/uploads/1/3/0/4/130435690/lunevilazudew_gakasoluze.pdf
    • http://brettwalter.com/uploads/1/3/0/3/130313070/tikixupuwos-podevabaluxol-velifepukori.pdf
    • http://everyhundredmetres.com/uploads/1/3/0/7/130775806/mefakanof.pdf
    • http://adsl-63-204-18-53.benefitplans.org/uploads/1/3/0/6/130639256/130639256.html#hiv+aids+policy+in+the+workplace+in+south+africa

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063dd.bin
c9c0f762ea1eb4c20e0ccc8073dce88a18d498eb818f039099f0c9e2c0d259ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DD 8236 bytes

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