Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9557711b63e285…

MALICIOUS

PDF

33.2 KB Authoring application: LibreOffice Draw
MD5: a7dcf240438cfe2123a1b7c85f96e95f SHA-1: cf40c4f3500a75f697c3d705e3fb48c5a038d077 SHA-256: 4b9557711b63e285c53af117939d5b046ed640921f4c69ffc5efb55723adebf1
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, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, mentions 'Coroners court qld forms', suggesting a lure to disguise the malicious intent. The primary function appears to be directing users to a network of linked PDFs, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://gevogiduxiwim.weebly.com/uploads/1/3/0/4/130435741/5452861.pdf
    • http://myrole.io/uploads/1/3/0/5/130589373/kakulamaga_febejaxetojorex.pdf
    • http://dan.mir-tattoo.ru/uploads/2020/01/29/duxamiv_doligaki_lipud_jatetarek.pdf
    • http://minnehahalawns.com/uploads/1/3/0/5/130539757/gomarimepunoxako.pdf
    • http://advanceproductservices.com/uploads/1/3/0/4/130478935/rezin.pdf
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/3/130323894/130323894.html#coroners+court+qld+forms

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010a9.bin
682e0b44d69f453e5bbe2295b1db3ee5a62afa17fef61f1227776075b6be5c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9 8036 bytes

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