Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cfea7c6f698049…

MALICIOUS

PDF

138.1 KB Authoring application: Solid Converter PDF
MD5: 1da031e789dacf7ac74de5200a010e31 SHA-1: aa1f56fa007146cdfe58763dba6cc6586128dcd8 SHA-256: b7cfea7c6f6980497c6c43bef76da0dd23cd532c7c168cda77afd1a86fdb508d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to interact with a command-line interface, likely to download and execute a secondary payload from one of the provided URLs. The ClamAV detection further supports its malicious nature.

Heuristics 4

  • 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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://poppies-daycare.co.uk/uploads/1/3/0/3/130323962/jugajesixinup-gokofamodeke-jigom.pdf
    • http://dowo.okgelenk.pw/uploads/2020/01/29/2795113.pdf
    • http://wisconsinstringquartet.com/uploads/1/3/0/6/130621412/movexib_pavinixamiwebal.pdf
    • http://independentit.net/uploads/1/3/0/6/130604740/7278512.pdf
    • http://moulinsdecharlie.com/uploads/1/3/0/4/130476943/mivumege_pibegu_dinotofosajarib_kekedeziratefa.pdf
    • http://anniesditta.com/uploads/1/3/0/6/130639860/foxixukikuzamiko.pdf
    • http://artispira.com/uploads/1/3/0/5/130539599/zobufa.pdf
    • http://sacredandsovereign.com/uploads/1/3/0/5/130547038/6534739.pdf
    • http://adoptme.info/uploads/1/3/0/6/130604336/130604336.html#biostar+handbook+pdf%E4%B8%8B%E8%BD%BD

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000bf37.bin
a90515451a1d28f2123fab5814b580de72417746498f2431933e8d36e0981049		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBF37 106784 bytes
font_00_sfnt_off0000141a.bin
51205936d390ff96e005791df0f3dbd1b98578246a98b34d9b42ed46d99a6579		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141A 9404 bytes
font_01_sfnt_off000096b8.bin
b0a6a33381002d1c379ca931d660fe98df7a73518421c8b234b9dc16af60e95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B8 2696 bytes
font_02_sfnt_off00009faf.bin
b4eaba1313c2ae02e0840532e8df49817f4492e706e7fc7006fa435ca033da2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAF 16208 bytes

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