Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff21eded5ac35367…

MALICIOUS

PDF

38.8 KB Authoring application: PDF Studio
MD5: 1604d349b4098f44107860a235aa01f0 SHA-1: b1143a1f4b27d27446e8cadfc9e0721b8268b190 SHA-256: ff21eded5ac35367954edfb95c8e640c2c6817addec2d6da53f019fa5c8b03ab
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting a phishing or malware distribution intent. The embedded URLs are the primary indicators of compromise, likely serving as lures or downloaders for further malicious activity.

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://madder.store/uploads/1/3/0/5/130551399/4da014.pdf
    • http://aisle3wines.com/uploads/1/3/0/5/130552034/9355042.pdf
    • http://nhbea.com/uploads/1/3/0/2/130271240/be9e41.pdf
    • http://mealofthemonthclub.com/uploads/1/3/0/5/130589180/9438056.pdf
    • http://mothermedicina.com/uploads/1/3/0/8/130874157/ab3cd03f53213.pdf
    • http://crtropicallivethedream.com/uploads/1/3/0/3/130379408/6e7c4351896.pdf
    • http://socalhomesavers.com/uploads/1/3/0/7/130739353/8207072.pdf
    • http://noahsusskind.net/uploads/1/3/0/5/130539934/gavorog.pdf
    • http://atlantic-accelerator.com/uploads/1/3/0/4/130488832/sanegegofoduv-miputevazo-kedewiwu-fasol.pdf
    • http://www.anneigardening.shop/uploads/1/3/0/6/130639145/92f48be6ffe.pdf
    • http://solreta.com/uploads/1/3/0/5/130551014/mabizidurukek.pdf
    • http://flouroessence.com/uploads/1/3/0/6/130620737/9353273.pdf
    • http://x64.net/uploads/1/3/0/8/130814290/vafumixasuzugumaliko.pdf
    • http://gobrandwell.com/uploads/1/3/0/8/130874197/lelim_xojudepidar_gebasuzogoxu.pdf
    • http://numihomes.com/uploads/1/3/0/6/130603895/29b7b53a77ab8.pdf
    • http://electro-hogar.com/uploads/1/3/0/5/130588984/c7c17cb06.pdf
    • http://neverwhisper.com/uploads/1/3/0/6/130621901/ganowe-lugizegu-kaperedumu.pdf
    • http://sunnydawnpetgrooming.com/uploads/1/3/0/4/130490665/130490665.html#catalytic+air+pollution+control+commercial+technology+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003b80.bin
f401be5db1644e5894c03d48354e461744ff1bb2dedcfa82424928ad771f2a2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B80 7780 bytes

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