Malicious PDF — malware analysis report

Static analysis result for SHA-256 78633a63cf658ba6…

MALICIOUS

PDF

44.4 KB Authoring application: PDFedit
MD5: cd26e53b2e96a04e9377857ed35cd83c SHA-1: 98c1cbba65d0c7b21672e84c902a791d9fa88e20 SHA-256: 78633a63cf658ba6d24688f8e3c6a301b3fa83208885111f0f41030fc6dfe541
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://whackyposts.com/uploads/1/3/0/7/130775299/xigem.pdf
    • http://sacredselfempowerment.com/uploads/1/3/0/8/130874085/penuwawijok.pdf
    • http://nathanraywilkerson.com/uploads/1/3/0/7/130739528/f8f97.pdf
    • http://stevenyasell.com/uploads/1/3/0/4/130478481/lofexe.pdf
    • http://pamensa.site/uploads/1/3/0/8/130813373/16eeaaef6ba4.pdf
    • http://moocpa.com/uploads/1/3/0/2/130270951/kibene.pdf
    • http://nimit.net/uploads/1/3/0/2/130270790/jikosewelasidu-jazigep-lowugowijox.pdf
    • http://retrofitinpractice.co.uk/uploads/1/3/0/5/130588656/pipevanuragof.pdf
    • http://www.sounddecisionbandswfl.com/uploads/1/3/0/4/130475982/768680.pdf
    • http://wonderful-yoga.com/uploads/1/3/0/4/130483678/a3e179b8c9.pdf
    • http://musicadventure.net/uploads/1/3/0/6/130621557/6ef843df558f3f.pdf
    • http://uptowncourt.net/uploads/1/3/0/6/130621048/ximekubifo.pdf
    • http://miningintelligencecapital.com/uploads/1/3/0/2/130289482/pudatusim_xidod_keluj_zuwemixolumu.pdf
    • http://seresespaciais.xyz/uploads/1/3/0/6/130621547/dd308.pdf
    • http://alittlesernity.shop/uploads/1/3/0/7/130739778/452ee5d5b.pdf
    • http://thebedrockinitiative.org/uploads/1/3/0/3/130312965/aed357eb4fc.pdf
    • http://man.mediutopia.com/uploads/1/3/0/9/130968917/130968917.html#cooling+tower+approach+and+range

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fd1.bin
213a11c2c3dcb8f9f51e35442db9184f67533fa366b032ab118810b5f70be851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD1 9220 bytes

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