Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dec4999c31331e9…

MALICIOUS

PDF

48.4 KB Authoring application: LibreOffice
MD5: a1220bc5af5f72f1030f899912e3b52b SHA-1: b4b43af276c67d1054baad486852c1c627ed02e6 SHA-256: 4dec4999c31331e9a8a7d9b8c5cc4bf8eb363fb91b0669c9baa624ba2741c7d0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, with a large number of embedded URLs pointing to external PDF documents. This technique is often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support the malicious nature of this file. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://germansintheus.weebly.com/uploads/1/3/0/2/130274269/02a4c.pdf
    • http://napervillecarpetclean.com/uploads/1/3/0/2/130289723/xusugu_pezusuzoribe.pdf
    • https://jofikovevaja.weebly.com/uploads/1/3/0/5/130539871/xenerigukidixe.pdf
    • http://ancientcraftstudio.com/uploads/1/3/0/5/130588663/7c7fe0d4.pdf
    • http://montgomerytattoos.com/uploads/1/3/0/5/130543437/fusanegiraj.pdf
    • http://jef.kirovkray.ru/uploads/2020/01/28/naridanitefusawix.pdf
    • https://nerekizebefapid.weebly.com/uploads/1/3/0/5/130539108/julupatukikina-devaropirog.pdf
    • https://kulolanodalar.weebly.com/uploads/1/3/0/5/130551197/puluranavinexames.pdf
    • http://staceyjanedouglas.com/uploads/1/3/0/6/130604821/duxavefaza.pdf
    • http://americanroofingassociation.com/uploads/1/3/0/2/130273616/1339512.pdf
    • http://morethansoulfood.net/uploads/1/3/0/4/130477009/zabovaxoresad.pdf
    • http://like.remont-msk8.icu/uploads/2020/01/28/7849024.pdf
    • http://budgetrollershutters.net/uploads/1/3/0/6/130639856/gaxiwalikoj.pdf
    • http://baikal22.ru/uploads/2020/01/28/letefikuwoxup.pdf
    • https://zevefuzirigudum.weebly.com/uploads/1/3/0/4/130478110/8896927.pdf
    • http://diet-helper.club/uploads/2020/01/29/kemejetutikujafoseju.pdf
    • http://vovisologe.kowls.xyz/uploads/2020/01/27/vurekifetate.pdf
    • http://kuhni07msc.icu/uploads/2020/01/27/8317783.pdf
    • http://bayislandsoapco.com/uploads/1/3/0/4/130436234/xetok.pdf
    • http://mountainofgod.org/uploads/1/3/0/4/130436180/a21b45.pdf
    • http://drizzlehealthy.com/uploads/1/3/0/6/130604759/7292891.pdf
    • http://princestreetam.com/uploads/1/3/0/6/130603873/nixoximetimawari.pdf
    • http://atlanta-treeservice.com/uploads/1/3/0/6/130639888/losowoxevakajumenizo.pdf
    • http://mymissblue.com/uploads/1/3/0/5/130551623/130551623.html#practica+de+enlaces+quimicos+pdf
    • http://vovisologe.kowls.xyz/uploads/2020/01/27/vure

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000101e.bin
cdbafcf57b41f4600971ee0054874130b568e55c755b420bf07f0bdd647bbd46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101E 9900 bytes

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