Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db70acc8a652d3c…

MALICIOUS

PDF

44.1 KB Authoring application: QPDF
MD5: 9cfb0e43bb30ba0c3c3ab7376fd59cc5 SHA-1: 0c139dc2a3214d0cee7d9d97389dcfd305bbb895 SHA-256: 1db70acc8a652d3c181def5ff3d9ee99ab4c14b18cbb66c04deccd5010463ed8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The primary attack pattern involves directing users to a vast array of linked PDF files hosted on numerous domains.

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://nationalarenaswimmingleague.org/uploads/1/3/0/6/130604358/gokamofubuziwu.pdf
    • http://escapegamesrooms.com/uploads/1/3/0/2/130288458/5672020.pdf
    • http://newarkvalleychamber.com/uploads/1/3/0/7/130739935/0fb0bbd3262.pdf
    • http://repentir.me/uploads/1/3/0/4/130483070/eca9480.pdf
    • http://wekickseriousbutt.com/uploads/1/3/0/3/130313398/guvelabafare.pdf
    • http://adamgoodbet.com/uploads/1/3/0/2/130271113/suzedetegiguladesido.pdf
    • http://iteamedu.in/uploads/1/3/0/5/130588445/8017653.pdf
    • http://nilakim.com/uploads/1/3/0/7/130739098/wokufulukukip.pdf
    • http://michellegibbensdsdirect.com/uploads/1/3/0/6/130640020/vepigivirevome.pdf
    • http://missinglinkbrewery.com/uploads/1/3/0/7/130775519/dasuwosuvug.pdf
    • http://dalmatiansofkentucky.com/uploads/1/3/0/6/130639835/6787661.pdf
    • http://balsamrootcatering.com/uploads/1/3/0/3/130379361/noxoraronesalikos.pdf
    • http://setreport.com/uploads/1/3/0/7/130775543/350307.pdf
    • http://kpopsingles.com/uploads/1/3/0/5/130543877/9956667.pdf
    • http://afaparents.org/uploads/1/3/0/2/130287514/130287514.html#cbse+class+10+english+literature+reader+book+pdf+download+in+hindi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300e.bin
acb59c95da480c13c7c4269ed56a3639ec299ec15be85a43907ca9a51a6a06cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 11756 bytes
font_01_sfnt_off0000519e.bin
2fed81cd587f9d12e18139ec4d7005caeb29e45ab3df3e21f57f55080060f9a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x519E 8204 bytes

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