Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cba141e960f85c3…

MALICIOUS

PDF

75.1 KB Created: 2021-03-29 00:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecc2b450720a621e7afc98aea8eafbef SHA-1: cc6111d8876a47d18dd5bc898c27aa5b4af1e8e1 SHA-256: 9cba141e960f85c35ac83a21b02d5361b8521a31510c2c95285ac40d1c3b9c8e
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that mimics a search query, likely intended to trick the user into visiting a malicious site. The PDF structure itself appears to be generated by wkhtmltopdf, and while no scripts were explicitly extracted, the presence of embedded URLs and the ML/ClamAV detections strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=define+genitive+case+in+latin
    • http://japarof.mywebcommunity.org/tibaderemibokesepinamugi.pdf
    • http://rakapugijumub.sportsontheweb.net/cengage_maths_algebra_download.pdf
    • https://cdn.sqhk.co/nogawevorus/hiajbhb/9809585869.pdf
    • http://gunoxeririrof.iblogger.org/alphabet_pronunciation_english.pdf
    • https://cdn.sqhk.co/kitujesijak/hjjf4JO/download_standoff_2_mod_apk_obb.pdf
    • https://dijaxoki.weebly.com/uploads/1/3/4/6/134666341/mazevive-tadovuginazufop-zowelupoliz-tivadomagi.pdf
    • http://femuxeririta.mygamesonline.org/74883980813.pdf
    • https://wijekuwonud.weebly.com/uploads/1/3/4/6/134645716/dipevorumuxawidad.pdf
    • https://tamaxanafe.weebly.com/uploads/1/3/1/8/131856242/logudekawabe-vorix.pdf
    • https://lirodenagegoket.weebly.com/uploads/1/3/1/4/131437677/dd4deea51cfdc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jodojan.epizy.com/fomodinofo.pdf
    • http://wegugoleta.onlinewebshop.net/mudefijuves.pdf
    • http://disoluje.myartsonline.com/beats_solo_pro_noise_cancelling_black_friday.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_off0000e787.bin
23a435054164f202d1664baf9621cfe3902365d534d23a3204458c916e734410		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 5012 bytes
font_01_sfnt_off0000f8c6.bin
909dc5313d64b8c0957facac8558d9c069173f1db5b5dc6a4be4def9c614b616		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C6 12244 bytes

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