Malicious PDF — malware analysis report

Static analysis result for SHA-256 92dfdced5522ce8d…

MALICIOUS

PDF

105.5 KB Created: 2021-02-23 03:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34f45f2e4a2f3833219faba8770320cb SHA-1: e12a8e80cc8b1ebf50bba75a3209da9d31c2fc51 SHA-256: 92dfdced5522ce8d29c0e61e7bb09839e947eea363252fe204431d7ef57631d4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://druttle.ru/wix?keyword=mega+man+9+ost', suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URIs and the malicious verdict strongly indicate a malicious intent to redirect the user to a compromised site.

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://druttle.ru/wix?keyword=mega+man+9+ost
    • http://redirunna.xyz/anabolismo_bacteriano0vbds.pdf
    • http://tojipipawerar.22web.org/xazaviwose.pdf
    • http://samyog.ru/zurunixepafovotakuuyeze.pdf
    • http://dorightschool.com/paint_by_numbers_puzzle_gamen2uog.pdf
    • http://fufodew.22web.org/a_logo_quiz_answers.pdf
    • https://perasukene.weebly.com/uploads/1/3/4/6/134644841/nufanalod.pdf
    • http://hdvideo.design/poulan_electric_chainsaw_16_inch2pzd9.pdf
    • http://cmbclientes.com/47072931670nglfy.pdf
    • http://doctora.club/60302543582t38b6.pdf
    • http://shop-profildoors.ru/138773725580esul.pdf
    • http://stroymarketmetal.ru/romantic_cartoon_images_free3fxz2.pdf
    • https://lurafavef.weebly.com/uploads/1/3/0/8/130813461/fiduxaze.pdf
    • http://healthit.space/nea_puzzle_answerslqtul.pdf
    • https://kuzirorox.weebly.com/uploads/1/3/0/7/130775715/c8f7692d8e90.pdf
    • http://desoneveru.iblogger.org/big_mouth_book_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rogugagatuf/savebig.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a31.bin
93e884f05cf3e42d2971f4bc4c127d03e2768480e7fea85334dfba8271ea1ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A31 6676 bytes
font_01_sfnt_off00016127.bin
d4e6c2c3d4884b5e1013e63f723c956f97d914767421aee6570e26dbd72567a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16127 5036 bytes
font_02_sfnt_off00017248.bin
3121981a859ea84b9221b720f962130be5bf2afdd1fdc73e61038c28814e15fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17248 11712 bytes

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