Malicious PDF — malware analysis report

Static analysis result for SHA-256 37f5ed836aab56a9…

MALICIOUS

PDF

102.0 KB Authoring application: ImageMagick
MD5: c4c49f63f0d0e590af887df046992537 SHA-1: 71913cb08a4f269f27b9968c8fb43568b2653ff0 SHA-256: 37f5ed836aab56a98d4e52c3a6f941453a9cbf61d3cd280a0c4e2c98fb2624dc
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. ClamAV identified this as Pdf.Phishing.TtraffRobotInstall-7605656-0, and ML classifiers also flagged it as malicious. The embedded URLs are the primary IOCs, pointing to various domains that host PDF files.

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://startingpoint.info/uploads/1/3/0/6/130621915/cb3ca15fe540c0.pdf
    • http://bathgenics.com/uploads/1/3/0/5/130539046/benasu.pdf
    • http://nashvillerollingpinco.com/uploads/1/3/0/2/130271143/8002cf.pdf
    • http://lafabriquededessins.com/uploads/1/3/0/6/130639608/5230042.pdf
    • http://localseonyc.net/uploads/1/3/0/5/130551623/gizebi.pdf
    • http://admin.natrulay.co.uk/uploads/1/3/0/4/130476442/6c79ab73af98d.pdf
    • http://hemcarsi.com/uploads/1/3/0/8/130813999/kiponekil_zepumita_megipegivugabo_jaburam.pdf
    • http://nevermoreacrespetrescueinc.com/uploads/1/3/0/7/130775292/4472587.pdf
    • http://happycamperllc.com/uploads/1/3/0/6/130604109/3296482.pdf
    • http://musicincorporation.com/uploads/1/3/0/5/130551267/timewifiwovanoximul.pdf
    • http://southbridgewbc.devsite-1.com/uploads/1/3/0/5/130539763/130539763.html#teoria+da+contabilidade+eliseu+martins+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005562.bin
efc909b2a8d8078704e90eb88e82055505f623f1fd631e25bf662967a50788e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5562 13644 bytes

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