Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e785653d991e18…

MALICIOUS

PDF

43.4 KB Authoring application: Poppler-utils
MD5: a56f01d1a5e38716fb69c2a85143e4b6 SHA-1: a27580fb579ef0695547d545877542c40c121765 SHA-256: 31e785653d991e1862bc9d41b3fe090f1d1610e8d6858d6de6e71bc9a56d82a1
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique commonly used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary heuristic, PDF_SEO_LINK_FARM, identifies the mass linking to URLs hosted on `thenaturalway.shop` and similar domains, suggesting a coordinated effort to redirect users to potentially harmful content. No scripts were extracted from this sample.

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://thenaturalway.shop/uploads/1/3/0/2/130274169/rejugadexef.pdf
    • http://nawrocki-law.com/uploads/1/3/0/8/130814407/1154899.pdf
    • http://mscalvin.com/uploads/1/3/0/5/130588157/puranenom.pdf
    • http://ksginc.net/uploads/1/3/0/6/130639034/c0591dbd41b.pdf
    • http://flowdoser.info/uploads/1/3/0/5/130548039/fubivapefuvipogogez.pdf
    • http://sportyogalady.com/uploads/1/3/0/6/130620627/9600020.pdf
    • http://towingsurrey.com/uploads/1/3/0/7/130776503/puwemupito-katib-niligenapuzow-lerimodemod.pdf
    • http://nootkasoundretreats.com/uploads/1/3/0/5/130551445/f0ab014.pdf
    • http://slimecraft.online/uploads/1/3/0/4/130476317/7992882.pdf
    • http://diamondmarvel.com/uploads/1/3/0/4/130483866/45f41a3c9.pdf
    • http://inventureconsulting.net/uploads/1/3/0/3/130379492/1ebbd34a60.pdf
    • http://togobogo.com/uploads/1/3/0/4/130489144/navamarenojux.pdf
    • http://tattletalesboutique.com/uploads/1/3/0/6/130621758/2cabc4e8dcc39.pdf
    • http://kathleen-cortez.pleasingfood.com/uploads/1/3/0/3/130323124/130323124.html#difference+between+cyclic+hemiacetal+and+cyclic+acetal
    • http://sportyogalady.com/upl

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e6b.bin
cf2338b7895a3a873add1db7dfb411390262a2a3d24e5b3dccff59843624ea97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6B 2704 bytes
font_01_sfnt_off00003760.bin
42fec308b7cab2f393414e9bdc1a6bd25b4aa0b9070acde390e3b63ffb91afd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3760 16100 bytes
font_02_sfnt_off00004f24.bin
73328c2c1c7a89d4b8efbb77f54034707a6d92c27431f73797cf25c3ed56ff0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F24 8632 bytes

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