Malicious PDF — malware analysis report

Static analysis result for SHA-256 833a9c888876fcb7…

MALICIOUS

PDF

70.6 KB Authoring application: Inkscape
MD5: f867e42915014ec9793fc928f4c059d9 SHA-1: 88472835bb0341ec4dc77dfb0b16d650a0ebb728 SHA-256: 833a9c888876fcb7d7afd772f75ce46f3343896a1fb5be3ffb7083277afa6955
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file 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. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://jozibestwomensclinic.com/uploads/1/3/0/6/130620839/2385332.pdf
    • http://pokergrindermaster.com/uploads/1/3/0/3/130323588/xoxireruvekekut_mogobafulakasun.pdf
    • http://airyfitness.com/uploads/1/3/0/6/130621315/2984290.pdf
    • http://coffeetoons.net/uploads/1/3/0/5/130589104/fapawoxipuviken.pdf
    • http://aesco.com/uploads/1/3/0/2/130289721/9371401.pdf
    • http://mrsparsons.net/uploads/1/3/0/6/130639884/pubakovedaf.pdf
    • http://michellerodesinteriors.com/uploads/1/3/0/4/130436130/sediwurijus_wiwadez_jozowinukadebap_gefatoderidulox.pdf
    • http://newpstowing.com/uploads/1/3/0/6/130621805/d42ad3f9251.pdf
    • http://userfriendlyfaith.com/uploads/1/3/0/6/130639055/jopitipofako.pdf
    • http://coremedicalassociates.com/uploads/1/3/0/6/130621844/bejirowovoxewa.pdf
    • http://clucktruckportland.com/uploads/1/3/0/5/130544078/130544078.html#pmp+questions+on+scope+management

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000137e.bin
b81b613215bf3ae254660c5f947a838e73d953ddaadbb1093f89008ab001f0c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137E 9624 bytes

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