Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa6598303358698…

MALICIOUS

PDF

29.5 KB Authoring application: Smallpdf Desktop
MD5: df2fe40dd62906891f41527ec7f26505 SHA-1: e299321184cf40e23aafaa9ced26a5164c69241f SHA-256: 0fa65983033586986c9b9fea76791cd1bd7b4404799696eb46f8c5f9c174dc1e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm for SEO or phishing purposes. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further indicate malicious intent. The embedded URLs likely serve as lures to download further malicious content.

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://nanoteacher.weebly.com/uploads/1/3/0/3/130312951/rolomasifox.pdf
    • http://sosawosok.zoomroom63.ru/uploads/2020/01/28/82717b0f37.pdf
    • http://beemyhoneyapiary.com/uploads/1/3/0/6/130620694/gutudinisi.pdf
    • https://famoderowasaka.weebly.com/uploads/1/3/0/5/130538985/9262314.pdf
    • http://ncrage.com/uploads/1/3/0/6/130639363/bivatelemav_foforibov_jizavoloz.pdf
    • http://bcatml.weebly.com/uploads/1/3/0/6/130604126/mozawivesiguxop-vugutexejejazi-pulutefazofa.pdf
    • https://gapefakopo.weebly.com/uploads/1/3/0/4/130476624/vunugorilosix.pdf
    • http://mercy-reigns.com/uploads/1/3/0/6/130620698/robukesukonate_jaluruguwero_vutefuwejivepof.pdf
    • http://popov.space/uploads/2020/01/27/902db.pdf
    • http://nirisu.remont-msk5.icu/uploads/2020/01/29/550994.pdf
    • http://kelsweet.com/uploads/1/3/0/6/130621755/048fb.pdf
    • http://anderson-hammond.com/uploads/1/3/0/4/130488846/1158215.pdf
    • https://rapiviwobefedes.weebly.com/uploads/1/3/0/4/130435544/rokogupa-dikikidoro.pdf
    • https://jarezuvarasor.weebly.com/uploads/1/3/0/5/130538842/358328.pdf
    • http://ranufulo.prekrasniy.fund/uploads/2020/01/29/a6b63c.pdf
    • http://marthas-manor.com/uploads/1/3/0/2/130271159/nuzuxalujodirep.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/4/130478123/130478123.html#hazard+ratio+reporting

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013cc.bin
210abfccdfc8a8a2dd5650a996d4548bb7f80dd58fc626b28b930297659e2f37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC 6496 bytes

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