Malicious PDF — malware analysis report

Static analysis result for SHA-256 37719ab832effc3a…

MALICIOUS

PDF

62.2 KB Created: 2020-11-26 07:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7342dd70ec39aeba6a2dd0205193f732 SHA-1: 75e171a401d539a2c9e02a7378efb7ccae596377 SHA-256: 37719ab832effc3ae5e60abf80fdef518ebb44a9752c8f18414d8ae6a28f945f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used for phishing. The document body, though heavily obfuscated, contains text related to 'Eagle pass isd tax office', reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=eagle+pass+isd+tax+office PDF link annotation
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/subogoxapabal.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/gifek.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/momarex.pdfIn PDF document text
    • https://webeboxux.weebly.com/uploads/1/3/4/4/134493090/5047430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f9c36812ec81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f94195081179.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazemi/nct_u_boss_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eefc304-34ed-47bb-b79b-5e6a4b362f79/69239637664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5d0c69-a9ee-4270-b089-015e3594ad58/wanadevuwujogijez.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/ascites_ultrasound_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd61110-b886-45e3-bd5b-46aa4d33e0e7/dawupala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2813a493-c673-466e-810b-8eb53af4598f/the_norton_anthology_of_american_literature.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/chemistry_textbook_for_senior_secondary_school_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/wijikesofumopasogam.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/tusevapokedipugizun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed0410db-49d0-4859-b9e7-1ba108002ac7/gasav.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB658 5252 bytes
SHA-256: 8f6ffd3b08c6f54c6c6f32d6fbeeb5f40dfde20143a49d4ed591a7de22a87506
font_01_sfnt_off0000c85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 10596 bytes
SHA-256: ce0ad17be93dd1a4c42c43fcde6b94aeaab718629175f9c237483864170fbc62

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