Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0e4989806a17d4…

MALICIOUS

PDF

40.8 KB Authoring application: PDFBox
MD5: d66c174b181f8aba6378fcd0b38893bf SHA-1: 157e61552fea347ec5ee9db364e76d41873111e1 SHA-256: 5d0e4989806a17d44e0d2f938c8f064a65cbe4eca35c452cc99e85fbd35539be
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of algorithmically generated URLs, many pointing to other PDF files, which is a common technique for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ultradeepfieldmusic.com/uploads/1/3/0/6/130620729/7636470.pdf
    • http://www.kirkparrish.com/uploads/1/3/0/3/130323158/562015.pdf
    • http://slowventures.net/uploads/1/3/0/6/130604378/afd566a97f.pdf
    • http://truedefdentallaboratory.com/uploads/1/3/0/6/130621392/besivitajefabekug.pdf
    • http://northcountypronetworkers.com/uploads/1/3/0/2/130270793/rolul.pdf
    • http://mvsexcavation.com/uploads/1/3/0/2/130270941/f60c0e5662ae4e.pdf
    • http://mrssnydersclass.com/uploads/1/3/0/2/130289466/bobewiko.pdf
    • http://bombayfrankiecompany.com/uploads/1/3/0/6/130622002/6ffbbd3a92d.pdf
    • http://www.sunflowervalleyboutique.com/uploads/1/3/0/2/130288465/1eefd3bd.pdf
    • http://www.kathleennesi.com/uploads/1/3/0/5/130588676/govira_fugusoveso_danomamir.pdf
    • http://delbertsonrealty.com/uploads/1/3/0/6/130604247/gopavisagejuvadiva.pdf
    • http://techb.org/uploads/1/3/0/7/130740073/7602831.pdf
    • http://nwm6.club/uploads/1/3/0/4/130488839/15eedd.pdf
    • http://northpacifictrainingperformanceinc.com/uploads/1/3/0/6/130640070/83644f63e43ed.pdf
    • http://slccabroad.com/uploads/1/3/0/5/130588763/5468314.pdf
    • http://nannytherapy.net/uploads/1/3/0/5/130550736/ef4ad1a2.pdf
    • http://motionnotionfestival.com/uploads/1/3/0/5/130590334/3782759.pdf
    • http://gocustomstamps.com/uploads/1/3/0/2/130272930/ce0609a43.pdf
    • http://mvbabysitting.com/uploads/1/3/0/5/130590043/vuvanuzijexasepo.pdf
    • http://lezleewillems.com/uploads/1/3/0/5/130543453/pilox.pdf
    • http://getalittlegreener.com/uploads/1/3/0/6/130620889/130620889.html#exercicios+sobre+adjunto+adverbial+8o+ano+com+gabarito

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003d56.bin
692e1ce9b1459bd073490a6dca92b4a810b00f3da9fdfa9d9921b1f2ed0c208f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3D56 10404 bytes

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