Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a6b8eb5c101045…

MALICIOUS

PDF

77.3 KB Created: 2021-04-27 21:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4f57424ccdd3778b3c50a11e1a5c2a9 SHA-1: b62da8a2f0c3dec7d992bcd6191dc23d69f98c43 SHA-256: 66a6b8eb5c101045ad8725cd4929a7fa8df2689c542e84534a8e515fd89d0d69
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b97d98876c0bda8b339ef28f17723af3/jixobijefefete.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b69836fbc6---zatadekigezod.pdf
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/i2adh462irpdplpiip2ao18c52/34468103340.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ecd7f188bbe5c27c0fc3662e3fd68aab/53029383967.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/20723a1a084b2f7ba743c087393d0ecb/84751540021.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bb7d3c631---79017346135.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c78bc9b4c4---woxuwutemidavina.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16082fdffa672d---letuzen.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/22dc7aa757597ded8a6f8b435172f00c/18132908369.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/jd4int0456pgn8fs4r1rsarq94/dugovori.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd05ec3f2---38130579849.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080ac21a93fc---15579017822.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e5418c8f4---belumorituwel.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/87qmdtr8l5au72akh6r8o9b3l4/79638836597.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4b648625---34857198218.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/8ec65fd4d0c433bb15c1769d3256dd2a/67646299493.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b11c418ed---laxefogafe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=alta+frecuencia+estetica+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_off0000e42f.bin
66c383c09c2cc750b7dccd5ffb94a96f2837c0b0e3534038145d41530a572de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 4912 bytes
font_01_sfnt_off0000f4e7.bin
4241e2ce0165788fbbebee7cd5ef4c114c8730dd9d5d30fd293caeea0d98996b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 10932 bytes
font_02_sfnt_off000118a3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 4324 bytes

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