Malicious PDF — malware analysis report

Static analysis result for SHA-256 112f9940cee73669…

MALICIOUS

PDF

90.4 KB Authoring application: pdf-parser
MD5: 94f902d0d599640ca4c48b420cb24cdc SHA-1: 5170689e9a689b56cf2fa55c6cab5b90d6be16b1 SHA-256: 112f9940cee73669228d24f647a9254ad974033071383749e1c28b2eceef6d82
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://northernessentials.net/uploads/1/3/0/3/130313220/xivaserowusot.pdf
    • http://cookseyplumbing.com/uploads/1/3/0/5/130542953/cf52741.pdf
    • http://ganowozu.vipiski-besplatno29.icu/uploads/2020/01/29/sabitipobubafa.pdf
    • http://second-childhood.com/uploads/1/3/0/3/130323836/e314ba0eba169e.pdf
    • http://gos.tatarstan.travel/uploads/2020/01/28/8255302.pdf
    • http://lol.printtex.biz/uploads/2020/01/29/3a9600e.pdf
    • http://notesinthemargin.co.uk/uploads/1/3/0/4/130476624/metekajukefezo.pdf
    • http://asphaltisland.com/uploads/1/3/0/4/130483207/refarexak.pdf
    • http://southenddiving.co.uk/uploads/1/3/0/4/130494478/1836564.pdf
    • http://thehnossaproject.com/uploads/1/3/0/2/130271139/130271139.html#angry+birds+transformers+wikipedia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001399.bin
8382b87e555b41a8a9920a64fc7c20fb381a435a3f962f165e06e17cc29ef9b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1399 10620 bytes
font_01_sfnt_off00008f49.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F49 2652 bytes
font_02_sfnt_off00011eb5.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB5 16036 bytes

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