Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f11652751af41b…

MALICIOUS

PDF

63.4 KB Created: 2020-12-01 02:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ff671f128d163313fddce3d4e26013 SHA-1: 72a7b2c66dc6951afc6b7d80349e508dd7c7f678 SHA-256: d7f11652751af41b724eec82073df2dcadf9b5e508a5ad2ac87c56ebaa97b529
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a suspicious domain, identified by ClamAV and ML classifiers as malicious. The document body, though heavily obfuscated, appears to contain metadata related to 'Olivet middle school' and 'wkhtmltopdf', suggesting a lure. The presence of an external URI points to a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://trafffi.ru/strik?utm_term=olivet+middle+school
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/5763970.pdf
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/rirewotubazejibigi.pdf
    • https://giwonogudere.weebly.com/uploads/1/3/4/8/134872327/5647512.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/10504859-b7f0-4de0-9845-d964b60bf017/boleyn_family_history.pdf
    • https://s3.amazonaws.com/wovigebi/nunokanikuzuvizixovir.pdf
    • https://s3.amazonaws.com/davubewu/97239492866.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf28045ca4f7902651b6b/1606218368861/93215996634.pdf
    • https://uploads.strikinglycdn.com/files/ef25a751-4115-4909-b333-671ba5d6c1bc/radio_shack_pro_651_manual.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf946e6d49a06bb56ff58/1606285638203/snake_in_the_eagles_shadow_streaming.pdf
    • https://s3.amazonaws.com/levumoduf/lab_table_minecraft.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd33.bin
a093563894637d2976f0589118c775fbf4ee4ba584a2f0a97b0bd73c99e9a805		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD33 4960 bytes
font_01_sfnt_off0000cdf8.bin
60d897327a7f70d5d872599a1f1d67bfbc3659a71a51085b4b1a2407a6b979d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF8 10328 bytes

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