Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f711cc44ba4d9ef…

MALICIOUS

PDF

40.4 KB Authoring application: Serif PagePlus
MD5: 15df9911cb4d645a5298d540275a34f0 SHA-1: 185973d0e813a6b2a70266f7ab330894217ad211 SHA-256: 4f711cc44ba4d9ef5ee0afcb92be4b6288db401823c00ede1dec160bc84ed644
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The PDF_SEO_LINK_FARM heuristic indicates it contains a large number of embedded links to other PDF files, suggesting a link farm or distribution network. The document body contains text related to physiology, which appears to be a lure or obfuscation, as the primary function identified is the distribution of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://donenfeldlaw.com/uploads/1/3/0/4/130492771/bufefirotileke_fotifufoniw_nilexamuvezub_zupadoworosa.pdf
    • http://adeptwebsolutions.com.au/uploads/1/3/0/3/130313220/simisu-megutuni.pdf
    • http://eliteculinarychef.com/uploads/1/3/0/5/130539114/wakodiputuvuzujed.pdf
    • http://vollair.com/uploads/1/3/0/5/130589198/zipefipigud.pdf
    • http://momentumdavis.com/uploads/1/3/0/4/130435633/1f6ffa9f3db8e.pdf
    • http://mrsjdodds.com/uploads/1/3/0/7/130739996/vuvidaturi.pdf
    • http://michaelavolicino.com/uploads/1/3/0/4/130476045/zesasejatarig-lanemudizaw-ruvesamula.pdf
    • http://gradecaddy.com/uploads/1/3/0/3/130323968/2503476.pdf
    • http://millerwebdesignservices.evansconstructionconsultingllc.com/uploads/1/3/0/2/130272573/ratotemitipurikisa.pdf
    • http://misfitcrusaders.com/uploads/1/3/0/6/130639042/b5b64.pdf
    • http://mail.withmelshelp.com/uploads/1/3/0/6/130621441/2c3ac3bbc8e.pdf
    • http://drazenbuntic.com/uploads/1/3/0/6/130639404/1862402.pdf
    • http://hostmaster.ollyspizza.com/uploads/1/3/0/5/130538996/bidibadetubikezi.pdf
    • http://culturallyresponsivesustainedteaching.com/uploads/1/3/0/6/130603741/fodabukamegajetegu.pdf
    • http://solidmetrology.com/uploads/1/3/0/4/130479312/7f5fd4047d.pdf
    • http://www.rhbconstructorainmobiliariasrl.com/uploads/1/3/0/6/130639408/9781727.pdf
    • http://northernraiderstrackteam.com/uploads/1/3/0/7/130738629/sebage-wejololubejuze-zatiguzasit-nunewileri.pdf
    • http://inertiastructures.com/uploads/1/3/0/2/130287973/130287973.html#acid+base+balance+physiology+pdf
    • http://gradecaddy.com/uploads/1/3/0/3/130323968/2503

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002416.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2416 2600 bytes
font_01_sfnt_off00002ca4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA4 16036 bytes
font_02_sfnt_off00004343.bin
faa6bdd3fcb0d267e2fb7a6ce13a36fb6c34efe1031dab0649d5b721688ebc1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4343 6864 bytes

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