Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1639e5904e16ac1…

MALICIOUS

PDF

36.2 KB Authoring application: PDFBox
MD5: c9ce0b9eda474c616e29f19b6c7050df SHA-1: 98cb8ec8a3c5e6749dde7c287cf3f092fd9e7821 SHA-256: c1639e5904e16ac11e116332af1eef0ba740baebf99d101c17e62cab5b10f391
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary IOCs, pointing to a network of suspicious domains.

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://slimecraft.online/uploads/1/3/0/4/130476317/7992882.pdf
    • http://lemonthardware.net/uploads/1/3/0/7/130776518/5174610.pdf
    • http://karenvankampen.com/uploads/1/3/0/4/130478551/poweku.pdf
    • http://linda-schubert.com/uploads/1/3/0/5/130539139/1456975.pdf
    • http://thegypsyjourney.com/uploads/1/3/0/6/130639197/nusejoxiz.pdf
    • http://niagaranaturalfertility.ca/uploads/1/3/0/6/130603983/0e65b0bfe.pdf
    • http://micabotanicals.com/uploads/1/3/0/6/130605193/kitevowuvomunedezeb.pdf
    • http://solutionslocker.com/uploads/1/3/0/6/130621137/lepefubejojur-vabunuwazazivid.pdf
    • http://samanthasunday.com/uploads/1/3/0/4/130436389/830d3772b9e1.pdf
    • http://emilykasra.com/uploads/1/3/0/5/130551920/salosegog.pdf
    • http://24hourelectricianfl.com/uploads/1/3/0/6/130621880/tujatinazawosu_webedotejip.pdf
    • http://efwpartners.com/uploads/1/3/0/3/130313529/suvewuzusunasanid.pdf
    • http://marisabolson.com/uploads/1/3/0/8/130813398/8745611.pdf
    • http://www.barnfeeder.com/uploads/1/3/0/5/130551006/bexetixova.pdf
    • http://m3det7.com/uploads/1/3/0/4/130490643/gukifojogadukokoxejo.pdf
    • http://cameleylodge.eu/uploads/1/3/0/6/130603832/kusosekukuk-jegugu-xewiwup-sejujoz.pdf
    • http://mtbstell.com/uploads/1/3/0/6/130605017/8329948.pdf
    • http://alangelfand.com/uploads/1/3/0/6/130604158/ritafobe-sefadiwuf-dodite.pdf
    • http://deafperutour.com/uploads/1/3/0/4/130483848/zimivulodupa.pdf
    • http://www.nyiabc.com/uploads/1/3/0/4/130483869/9501294.pdf
    • http://wedoopovertyreduction.com/uploads/1/3/0/6/130604129/borupifodusija_zegisesuke_mijeripan_bumusogixa.pdf
    • http://soundsend.org/uploads/1/3/0/4/130476458/130476458.html#plant+cell+and+animal+cell+structure+worksheet
    • http://wedoopovertyreduction.com/uploads/1/3

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d1f.bin
1f65163c24de3708c34f33e6972c56999d93f86f72e6c361a9701b47f2e1f9e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1F 7768 bytes

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