Malicious PDF — malware analysis report

Static analysis result for SHA-256 221e51bca1f41c33…

MALICIOUS

PDF

46.5 KB Authoring application: Nitro PDF First seen: 2026-05-08
MD5: 5f6ab425a4f004321991eb6fb4ff16ca SHA-1: 1539c3845036e951057e5f160764da4ab46defba SHA-256: 221e51bca1f41c33cafb609af0eac2815cb5b91dc859cac241f007c54551a973
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique commonly used for SEO poisoning or phishing campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. The document body, though heavily obfuscated, also contains several of these external URLs, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://sperorebuilt.com/uploads/1/3/0/4/130435884/158b5ffb.pdf In PDF document text
    • http://sacredfeminineuprising.com/uploads/1/3/0/5/130539102/a4b2c066e07fef7.pdfIn PDF document text
    • http://myfampow.com/uploads/1/3/0/5/130550885/rixijitotakodefe.pdfIn PDF document text
    • http://notoriginal.shop/uploads/1/3/0/5/130551338/7878119.pdfIn PDF document text
    • http://austintxtherapists.com/uploads/1/3/0/2/130287881/dirivot.pdfIn PDF document text
    • http://solarbozo.com/uploads/1/3/0/4/130476112/dc702f6.pdfIn PDF document text
    • http://thatyoumaybelieve.com/uploads/1/3/0/5/130588352/bijimoz.pdfIn PDF document text
    • http://ladoniaherald.net/uploads/1/3/0/8/130874012/xezojuxafumewe.pdfIn PDF document text
    • http://textweight.com/uploads/1/3/0/8/130814851/9625530.pdfIn PDF document text
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/7/130740001/130740001.html#presentation+skills+quotesIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6 8560 bytes
SHA-256: 2d112fa816a3abf510b7899991b6af49e7030dd1ccf9461173d61f4624746ec7
font_01_sfnt_off00006a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9C 5276 bytes
SHA-256: 6ebb4dae08474b11210dd8a3a49dad0f4d97f8971c1eaabcbf912a8ee514ec25
font_02_sfnt_off00007b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B17 2596 bytes
SHA-256: 87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e

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