Malicious PDF — malware analysis report

Static analysis result for SHA-256 603f43bd5062735b…

MALICIOUS

PDF

29.5 KB Authoring application: Nitro PDF
MD5: c79bac06aab3b7bbe4457f81ce232afc SHA-1: 8bebe8c11f8b9bf8e0edf8c14b4b23b337a61535 SHA-256: 603f43bd5062735b6d1b6a32ceac643457ab30269edfb2dc837fab58a7e8d05b
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The primary attack pattern observed is the embedding of a large number of external links, likely to distribute further malicious content or for SEO manipulation. The document body contains garbled text, suggesting it is not intended for direct user interaction but rather as a container for these links.

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://admin.learningdifferencesresourcegroup.com/uploads/1/3/0/8/130874053/zesuzizujipinuvo.pdf
    • http://moneymantra.net.in/uploads/1/3/0/2/130272102/gimezu.pdf
    • http://amberbowmanfit.com/uploads/1/3/0/6/130604687/c1de917b.pdf
    • http://evanjorgensen.com/uploads/1/3/0/8/130813922/6206369.pdf
    • http://sterilesupplies.com.au/uploads/1/3/0/2/130287997/a09482affa.pdf
    • http://urbanflairoutfitters.org/uploads/1/3/0/5/130551543/3217cef6c6c5dc4.pdf
    • http://commongroundbyronbay.com/uploads/1/3/0/7/130775135/3012785.pdf
    • http://missionexcell.com/uploads/1/3/0/5/130546543/5194322.pdf
    • http://www.thecheasery.com/uploads/1/3/0/2/130287883/b9873ce.pdf
    • http://theapexbasketballtraining.com/uploads/1/3/0/4/130483864/girotejota_gudanilixovumap_liposadegejibub_fupefetifunu.pdf
    • http://341.bpmtc.com/uploads/1/3/0/5/130588769/lilatinubomogow.pdf
    • http://mxjoinus.net/uploads/1/3/0/2/130272649/kukufi-juloni-tamofel.pdf
    • http://themeditationpeople.com/uploads/1/3/0/2/130288864/fa1d681ab10.pdf
    • http://tripledogdare.com/uploads/1/3/0/7/130739619/wumujezirixi-latekixig-futikutorem-tefomewagebe.pdf
    • http://mybrookfield.org/uploads/1/3/0/7/130738731/nujujedoz.pdf
    • http://kcdermodywriter.com/uploads/1/3/0/2/130272233/jovuzabenozapa.pdf
    • http://espressoaddict.com/uploads/1/3/0/6/130603858/xanabebawojebi.pdf
    • http://rhiannongower.com/uploads/1/3/0/6/130605519/130605519.html#this+is+me+karaoke+the+greatest+showman+with+backing+vocals

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000018b2.bin
d5ce0a834a9395e14bfe9569512445c3ebc1ca495ad64908b024fed8052100fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B2 6820 bytes

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