Malicious PDF — malware analysis report

Static analysis result for SHA-256 104a3dabdf87f310…

MALICIOUS

PDF

43.4 KB Authoring application: SWFTools
MD5: d2157e75c0d31becf910f4b2463e83a1 SHA-1: d445af76157cf9a8a8c57c5c8cd10218ca5b5139 SHA-256: 104a3dabdf87f3106d92a3715ed584b35af37a431efb1ae7154bb67ed7f32006
152 Risk Score

Malware Insights

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

This PDF file exhibits a critical heuristic for a link farm, containing numerous external links to other PDF documents hosted on unrelated domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO spam or to distribute further malware. The embedded URLs suggest a pattern of redirecting users to potentially compromised or malicious sites.

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://freeapps-mobilesports.com/uploads/1/3/0/2/130270837/33edaf4.pdf
    • http://allencabinetshop.com/uploads/1/3/0/4/130483351/supijax_xizokuxipopo.pdf
    • http://newburghmodelrrclub.org/uploads/1/3/0/2/130287991/rodase.pdf
    • http://carpetlands.com/uploads/1/3/0/5/130541103/bowove_digisufo_pejujikokoj.pdf
    • http://tiadasempanadas.com/uploads/2020/01/29/9618464.pdf
    • http://tnpcdc.org/uploads/1/3/0/4/130435666/247e39.pdf
    • http://stjohnvianneymorisset.com/uploads/1/3/0/4/130483614/a92971a0cf19e.pdf
    • http://petsitteratlarge.com/uploads/1/3/0/6/130605174/7502283.pdf
    • http://christopherbirchmd.com/uploads/1/3/0/4/130436166/1451ac81b1f.pdf
    • http://dviarchitecture.com/uploads/1/3/0/3/130324027/5431e2b.pdf
    • http://c0nniewang.com/uploads/1/3/0/4/130476216/jirubuzalag.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/7/130775876/130775876.html#comparatives+and+superlatives+grammar+explanation
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e3.bin
37659387d421a24ce670637e7aa7d178201992d51a1ef22c13f08b325ac5b01e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3 8248 bytes
font_01_sfnt_off00006258.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6258 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.