Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a609eb05c98915…

MALICIOUS

PDF

35.8 KB Authoring application: Nitro PDF
MD5: 735720909a49b7cb5cac7d178cc9c165 SHA-1: 024d5060caff485182be5283db08f6974f24d7a0 SHA-256: 04a609eb05c98915480b85e6b1552703aabeb4779c3f9902ed75f99322b53d58
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were extracted, the embedded URL structure suggests a downloader or redirector pattern.

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://santamariaffa.org/uploads/1/3/0/7/130775443/butefome-warifijelis.pdf
    • http://kidsphilharmonic.com/uploads/1/3/0/4/130488833/vekute_lodani_xugov_dowebobu.pdf
    • http://www.empressco.net/uploads/1/3/0/8/130814401/1252819.pdf
    • http://perplexion.net/uploads/1/3/0/4/130489044/bodetazegem.pdf
    • http://hostmaster.thebakehouse.space/uploads/1/3/0/5/130550891/ribajifer-muruvubuwitat-lesamipemasazat.pdf
    • http://swinkz.com/uploads/1/3/0/7/130775607/wirejuka-niwitoxigipipin-wefezo.pdf
    • http://passiveprofiteer.com/uploads/1/3/0/6/130620684/e650646d651.pdf
    • http://euro-arabia.eu/uploads/1/3/0/4/130489175/554b8d5f5f.pdf
    • http://preview.preservedsound.com/uploads/1/3/0/5/130544953/dc0dc.pdf
    • http://www.missinglinkarchives.com/uploads/1/3/0/6/130639486/bazatobavoxolen.pdf
    • http://katherinesiu.com/uploads/1/3/0/5/130590059/dea556b7f7.pdf
    • http://hostmaster.aisukurimu.com/uploads/1/3/0/4/130488338/6581670.pdf
    • http://penguinjournal.online/uploads/1/3/0/7/130739318/vudatoropisobu-duxitukidizuzuv.pdf
    • http://northshorepersonalcoaching.sydney/uploads/1/3/0/6/130605179/veziverusate_mepuzusi_jezalipulaneze.pdf
    • http://xannora.com/uploads/1/3/0/6/130605156/116b6c9a6c191.pdf
    • http://adventuresofthezs.com/uploads/1/3/0/4/130489185/nilufutuj.pdf
    • http://74-123-79-94.mgwnet.com/uploads/1/3/0/5/130543787/130543787.html#airforce+y+group+question+paper+2018+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc6.bin
d144179da5a4a58398f14122461f0ec57ad49b9529e309ee20752eabe2bf00c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC6 7856 bytes

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