Malicious PDF — malware analysis report

Static analysis result for SHA-256 553b2c58d4cb1291…

MALICIOUS

PDF

159.5 KB Created: 2021-05-25 08:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dece6cfe9bdbc063129fca21e4cb427d SHA-1: 5d2eb19ae2854f9a95d6068c88108caf0c2ad429 SHA-256: 553b2c58d4cb12911edd3e1108fcf32da987bb0d59a63e8afc498d89f5239f3f
96 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'botokaw.ru', which is likely a phishing domain. The document body, though heavily obfuscated, suggests a lure related to downloading an 'Encyclopedia Britannica' PDF, indicating a social engineering tactic to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://botokaw.ru/strik?utm_term=encyclopedia+britannica+pdf+color+full+free+download
    • https://muxekedov.weebly.com/uploads/1/3/4/7/134706321/fcd8ceea.pdf
    • https://cdn-cms.f-static.net/uploads/4452395/normal_60258a6426d2c.pdf
    • https://cdn-cms.f-static.net/uploads/4484807/normal_600a6fe184599.pdf
    • https://static.s123-cdn-static.com/uploads/4407064/normal_5ff755e0687d5.pdf
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/wawex.pdf
    • https://cdn-cms.f-static.net/uploads/4446930/normal_6042fa379ce76.pdf
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/21a7f6979c45ef.pdf
    • https://wiguvizokon.weebly.com/uploads/1/3/0/7/130776253/vuxatevebazape-romatojep-suwolalutene-bobuzutod.pdf
    • https://kabukarolezero.weebly.com/uploads/1/3/1/0/131070374/6876512.pdf
    • https://cdn-cms.f-static.net/uploads/4468837/normal_6021a42b396a1.pdf
    • https://xabisemegebo.weebly.com/uploads/1/3/4/4/134491474/5655305.pdf
    • https://tazabavirivagi.weebly.com/uploads/1/3/0/8/130814173/vokizukoroj.pdf
    • https://firupafawaxif.weebly.com/uploads/1/3/4/1/134109114/9560254.pdf
    • https://cdn-cms.f-static.net/uploads/4369187/normal_604712e1da2a1.pdf
    • https://jadowusirufire.weebly.com/uploads/1/3/2/7/132740355/sotifuduzokak.pdf
    • https://cdn-cms.f-static.net/uploads/4447086/normal_603ed96d71587.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e32416d1-77a8-419a-84f5-ffac203702f1/losovumurexukiwev.pdf
    • https://s3.amazonaws.com/zetubakuz/8494485231.pdf
    • https://s3.amazonaws.com/pesetufavo/information_technology_management_for_business_manchester.pdf
    • https://s3.amazonaws.com/zifilobesumafi/56074598335.pdf
    • https://uploads.strikinglycdn.com/files/370b54c5-1751-40d5-b54e-fff29b8b9e3a/modern_calligraphy_alphabet_practice_sheets.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_off0000f2fa.bin
5b54d82d7b9180a019e2835414df923313b9d884da6fe9319f20d192770e56d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 109484 bytes
font_01_sfnt_off0002372c.bin
98242f926ed9b84fae04cbdea2104a370b9047035aaec1806125df758e11b432		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2372C 5264 bytes
font_02_sfnt_off00024939.bin
023ae88d847023995e88771f643c5c509b8599d686351607bcf49c66364463b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24939 11340 bytes

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