Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a09ebf7e2732be6…

MALICIOUS

PDF

41.4 KB Authoring application: Serif PagePlus
MD5: e6195ef7517c2d25f29759bb8ff90431 SHA-1: bdf430e198bf66397ec2582a7187b23c0ea64a9c SHA-256: 3a09ebf7e2732be6f243ccb5ddf792ded37a6cce2e021856c9f32f8f379d05cf
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique commonly used for SEO poisoning and distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely part of a link farm designed to direct users to malicious payloads.

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://nevadalawguide.com/uploads/1/3/0/2/130287441/5328336.pdf
    • http://midcountydentalcare.com/uploads/1/3/0/6/130605072/1725815.pdf
    • http://crystalroseco.com/uploads/1/3/0/3/130379087/8591747.pdf
    • http://jeromesbistro.com/uploads/1/3/0/2/130272963/c7436a0258265.pdf
    • http://zenumididu.gcointrading.com/uploads/2020/01/28/878800.pdf
    • http://101onthe101.com/uploads/1/3/0/5/130539105/3734547.pdf
    • http://nnoutt.com/uploads/1/3/0/5/130589214/rexoz.pdf
    • http://kobarun.stranatur.ru/uploads/2020/01/28/f559dbc65ee353.pdf
    • http://amhomeinspectionsinc.com/uploads/1/3/0/6/130639869/a30af04.pdf
    • http://420productionsok.com/uploads/1/3/0/2/130287915/1657102.pdf
    • http://xilitopi.netto-tc.ru/uploads/2020/01/29/lesabalakaz.pdf
    • http://canadianholisticcenter.com/uploads/1/3/0/4/130435927/kobamivatubes.pdf
    • http://bestofbaliadelaide.com/uploads/1/3/0/4/130436121/5476476.pdf
    • http://tobegenz.com/uploads/1/3/0/5/130588533/ca635609cfb74c7.pdf
    • http://kevin938.net/uploads/1/3/0/5/130590658/fusejiretumar.pdf
    • http://mountshastamassage.com/uploads/1/3/0/4/130476525/bonofoxiguj-pizafawemewib-botalafisik-zegozo.pdf
    • http://aifby.com/uploads/1/3/0/5/130589252/130589252.html#101+drama+games+and+activities+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001434.bin
906a18c3b214976907a5d3ee813afd62aea7015543ad1bda878627efa95b3c42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1434 8088 bytes

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