Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab5631f2728e388…

MALICIOUS

PDF

39.3 KB Authoring application: LibreOffice Draw
MD5: 032dead8876e5b5b2015c33236c19f9e SHA-1: 86295d70fbe6f461d42c526f854887e9e69f00d5 SHA-256: 8ab5631f2728e388030f4b2e966155d51497e3808ddf411f548c7e0fc8686705
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body contains a large number of embedded URLs pointing to external PDF files, suggesting a traffic-driving or phishing campaign. The primary intent appears to be directing users to a network of linked PDF documents hosted on various domains.

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://bardswine.com/uploads/1/3/0/3/130313624/3703355.pdf
    • http://solarscrappers.com/uploads/1/3/0/5/130544625/8b20735f9.pdf
    • http://aworldinneed.org/uploads/1/3/0/4/130483862/2125226c6b17.pdf
    • http://besunadolo.kovriki.online/uploads/2020/01/28/jewuje-guxowofemekomi-puzeluma-rotagixine.pdf
    • https://gasowiguduz.weebly.com/uploads/1/3/0/3/130324350/4574238.pdf
    • http://doulajane.com/uploads/1/3/0/6/130603889/gidame.pdf
    • http://leahrainy.com/uploads/1/3/0/3/130323767/6aa3fa55.pdf
    • http://bestforexrebates.com/uploads/1/3/0/5/130540077/21ac659bc.pdf
    • http://vob.digitalein.com/uploads/2020/01/28/031738ce302a20.pdf
    • http://msdanahamilton.com/uploads/1/3/0/5/130551309/dinegamute.pdf
    • http://ag47silverjewelry.com/uploads/1/3/0/6/130639811/kigemi-dunozimonak.pdf
    • http://newportheightsmc.com/uploads/1/3/0/5/130588403/kikokese.pdf
    • http://ginujebot.samokontrol.ru/uploads/2020/01/28/xipanikezowirubawo.pdf
    • http://nyjincho.com/uploads/1/3/0/6/130640070/modevinawakibi.pdf
    • http://milissweetstogo.com/uploads/1/3/0/6/130605078/sipufesizarawan-vulasiz-womoxola.pdf
    • http://newminerigs.com/uploads/1/3/0/2/130289441/xadojowozagu.pdf
    • http://michaelroll.net/uploads/1/3/0/5/130538941/5928800.pdf
    • http://asociacionperiodistaspr.org/uploads/1/3/0/3/130323934/130323934.html#rectangular+prism+volume+surface+area+worksheet

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016b9.bin
b5c0dcb5d85feda5806d35d6d021381bf54c0e709ba613df632a518600d5035c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B9 8512 bytes
font_01_sfnt_off00005da8.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA8 2652 bytes

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