Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61e177d6f4f7f32…

MALICIOUS

PDF

31.6 KB Authoring application: Pdftk
MD5: 23d69d4d1e59b7008ae127310fac0e91 SHA-1: f9a453bddc6ea590358c50cfa7496acbc4b99280 SHA-256: a61e177d6f4f7f328e4b918d808f57fa486574402239b48efe44e31ea79e0fd5
152 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files on various domains. This is indicative of a link farm used to distribute malicious content or conduct phishing attacks. The ClamAV detection and ML classifier further support its malicious nature. The embedded document body text, though truncated, mentions 'Axis bank mutual fund distributor empanelment form', suggesting a potential lure for financial-related phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://repairplumberfortworth.net/uploads/1/3/0/2/130274349/videvujozebinuf.pdf
    • http://daniellesmakeupcreations.com/uploads/1/3/0/6/130604708/0ebb8b8ce78.pdf
    • http://bityeti.com/uploads/1/3/0/2/130270941/xezimiwupolisa.pdf
    • http://brandingidol.com/uploads/1/3/0/5/130588499/lasixapabopupezat.pdf
    • http://fpucdn.com/uploads/1/3/0/4/130491008/26fd27d.pdf
    • http://www.xtra-clients-deals.com/uploads/1/3/0/6/130639827/juzuwozobebevu.pdf
    • http://clarionbobcatfootball.com/uploads/1/3/0/8/130874432/tasovevijoduwa.pdf
    • http://qmenthailand.com/uploads/1/3/0/6/130620579/tijugivaxa_xapavarodef_muzimutepego_rolasaxo.pdf
    • http://lockedsecurestorage.com/uploads/1/3/0/8/130874391/ziwurejurusel.pdf
    • http://csisecurityinc.com/uploads/1/3/0/7/130739860/nalufusokile.pdf
    • http://rycagear.com/uploads/1/3/0/6/130604333/fesugopedijujidob.pdf
    • http://www.flamencubana.com/uploads/1/3/0/8/130873852/130873852.html#axis+bank+mutual+fund+distributor+empanelment+form

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000024e7.bin
6590df6b36247b32f8d995a9950a5e7948fa133bd0ce03427cc8eec926742055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E7 7624 bytes

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