Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f8920ea144ef25…

MALICIOUS

PDF

29.9 KB Authoring application: Scribus First seen: 2021-06-13
MD5: 75576b76ac5210adb394e196a2f4edee SHA-1: 258db07260cac51afd7ee1ffd666b4c65c689ae0 SHA-256: 77f8920ea144ef25b7237d272143d9e6bec267339d5c4cdb615df5f61ef587f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and a machine learning classifier also flagged it as malicious. The embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://foto.vipiski-besplatno12.icu/uploads/2020/01/27/wiwosufuxaxivi.pdf In PDF document text
    • http://kcideal.com/uploads/1/3/0/5/130539584/1624670.pdfIn PDF document text
    • https://gebuvikixel.weebly.com/uploads/1/3/0/4/130476407/barusebodira.pdfIn PDF document text
    • http://nantigo.com/uploads/1/3/0/2/130289265/migojubeg.pdfIn PDF document text
    • http://pufomuni.firstcommonsense.com/uploads/2020/01/27/7040920.pdfIn PDF document text
    • http://lornahood.com/uploads/1/3/0/2/130291579/964315.pdfIn PDF document text
    • http://rideamr.com/uploads/1/3/0/6/130604110/jimobefozuli-jimokob-gapib-lizaxunepamiw.pdfIn PDF document text
    • http://bellespetservices.com/uploads/1/3/0/3/130324324/buvije-gibapezo-pemuregumukon.pdfIn PDF document text
    • http://cleanseatuk.net/uploads/1/3/0/6/130621903/lokobov-kofer-ratijalarinazof-koximeme.pdfIn PDF document text
    • http://nkdesigns.ca/uploads/1/3/0/6/130604637/6791627.pdfIn PDF document text
    • http://musesinthevineyard.com/uploads/1/3/0/5/130589279/wasojot_sepodonaxi_tedubogixapad.pdfIn PDF document text
    • http://mommymouth.com/uploads/1/3/0/6/130604342/130604342.html#boond+boond+roy+mp4+songIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5 7556 bytes
SHA-256: 89c3035d135a856a67ca8eaa08728d054accbbbbf4de3ed37896f545a6cdf0d5

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