Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8e3c3a1f694fc3…

MALICIOUS

PDF

41.4 KB Authoring application: PDFBox
MD5: 24322ed3e4adb111815e1a24a7748067 SHA-1: 47e0e7129624b408bc9918950afa13cc7b00b775 SHA-256: ac8e3c3a1f694fc34f299d6e539f97a39a51bab6afbe88dbad9d4f9b03ebaf77
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary attack pattern observed is a link farm containing numerous external PDF links, likely used for SEO poisoning or to redirect users to malicious content. The embedded URLs suggest a phishing or malware distribution campaign.

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://pugetsoundbirthingfromwithin.com/uploads/1/3/0/7/130776656/dorejepuv-donirokiv.pdf
    • http://nova-torg.net/uploads/1/3/0/6/130605314/86e2c94.pdf
    • http://poolpatioscreenrepairorlando.com/uploads/1/3/0/4/130488114/3083902.pdf
    • http://midsomersetmartialarts.com/uploads/1/3/0/4/130435712/5883536.pdf
    • http://noreencoupenpleinair.com/uploads/1/3/0/6/130640102/1480421.pdf
    • http://bgspecancandy.com/uploads/1/3/0/7/130739450/9622c956d5fa3d.pdf
    • http://mosquesjobs.com/uploads/1/3/0/7/130776745/rexizixekenujatadi.pdf
    • http://cdbtpsych.com/uploads/1/3/0/6/130604984/basedeli_mifojavuxun.pdf
    • http://t-vic.com/uploads/1/3/0/2/130292104/2a0d369e8.pdf
    • http://chaseinsulinbox.com/uploads/1/3/0/6/130621179/4a1a4cf9c0e361.pdf
    • http://pcaregionalconference2019.com/uploads/1/3/0/3/130323172/gisulonamopop-kejarevidulodo-nawokevuxiteki-jeretosolanug.pdf
    • http://frankieharrer.com/uploads/1/3/0/3/130313324/rigigixifagoduwaxogo.pdf
    • http://mindforyou.org/uploads/1/3/0/4/130478009/130478009.html#18th+birthday+party+invitation+templates+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013a1.bin
8697290e0d2139f7ae8831b3ffee3842bc03460474b3296ccde3ac31526c46b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1 8656 bytes

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