Malicious PDF — malware analysis report

Static analysis result for SHA-256 060fc4e98bc232ba…

MALICIOUS

PDF

41.4 KB Authoring application: Poppler-utils
MD5: 50cdc7a88f5b888b080978e80849efdf SHA-1: b8537c7db83adb2a9169ce5fa60ea31ebca7daf1 SHA-256: 060fc4e98bc232bafb3712ec3c7d56f603fe49192d0149e550b7f3afeb1550aa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the ClamAV detection and the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this file as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://eurekaarchi.com/uploads/1/3/0/6/130621788/fuzopuj-fawazab-punopetipev.pdf
    • http://solicitudnotasimple.com/uploads/1/3/0/5/130588928/fifuwitufu-kutivekiru.pdf
    • http://nanba-ryu.com/uploads/1/3/0/7/130738831/8491029.pdf
    • http://www.ukiahgunclub.com/uploads/1/3/0/5/130590096/barugeso.pdf
    • http://radiantlifeacademy.org/uploads/1/3/0/8/130813458/wuvugub-xesolewa-bubotix-xegusenufi.pdf
    • http://sidneyburks.com/uploads/1/3/0/9/130969476/rabige_lofuti_gubadoboz_xiwozazegu.pdf
    • http://keppingerlaw.com/uploads/1/3/0/5/130589286/zemowege-redegagisolozez.pdf
    • http://whateverwelding.com/uploads/1/3/0/3/130323301/4b8a9c900eb.pdf
    • http://fjbinc.com/uploads/1/3/0/7/130740550/gatuzabutep_suxet_gigelewidodis_vixolikurego.pdf
    • http://weavetastic.com/uploads/1/3/0/7/130776111/5835876.pdf
    • http://www.hilly100.net/uploads/1/3/0/6/130621060/sovasafonusofuxadi.pdf
    • http://sacasta.voyagerwebsites.com/uploads/1/3/0/3/130323632/130323632.html#crochet+cat+ear+headband+pattern

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003eab.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EAB 1708 bytes
font_01_sfnt_off000049d2.bin
190031559f570426893ec605a79aa439f299d8cd38cace0ce8c6ee1f69c54d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D2 8216 bytes

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