Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f5fa48b8ff1215…

MALICIOUS

PDF

38.8 KB Authoring application: Scribus
MD5: 2db6626f08f2d0a475b847d1db873dc3 SHA-1: 3909e0b29407ed875277b7ebb4c3fefebe3df9fe SHA-256: 64f5fa48b8ff12152fdc918d5561e3d8f51c6aa16a5592f21d020e993278563e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as detected by the PDF_SEO_LINK_FARM heuristic. These links point to various domains and likely serve to distribute malicious content or manipulate search engine results. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing or potentially malicious PDF.

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://nokutekiv.robopay.ru/uploads/2020/01/27/0b0c09.pdf
    • http://kiguvejem.e-meter.ru/uploads/2020/01/28/kugosefave_boxulesudaxopub_guwonumojalexun.pdf
    • http://militarywivessurvivalguide.com/uploads/1/3/0/4/130488619/4051237.pdf
    • https://wepenaroki.weebly.com/uploads/1/3/0/3/130379824/b480befa5652f9.pdf
    • https://wasinipige.weebly.com/uploads/1/3/0/5/130540540/1217865.pdf
    • http://muto.prosamoe.ru/uploads/2020/01/29/5347461.pdf
    • https://sopixizuzema.weebly.com/uploads/1/3/0/4/130494172/wilufewukokut.pdf
    • http://christianambulancenetwork.com/uploads/1/3/0/6/130639895/50a769c86c92.pdf
    • http://doctorfieser.com/uploads/1/3/0/3/130323227/dafubavosegifefamod.pdf
    • http://myqualityvalue.com/uploads/1/3/0/6/130640067/fidusepibaxorem-fisepowojifiban-wukojuwani-nitamalup.pdf
    • http://kylaconner.com/uploads/1/3/0/5/130550833/130550833.html#router+letter+template+fonts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012cf.bin
40e1b5012a820f2aedbaf0332899031b0d44cf0af4b1bef62b21c56c6ade6bdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF 8388 bytes
font_01_sfnt_off00005ca1.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA1 2616 bytes

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