Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd50bca4d3f23f57…

MALICIOUS

PDF

75.7 KB Created: 2021-05-06 10:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2de3473c2ecd15679dcc812c446849e7 SHA-1: d07f621050a63db55150b4969d82650457ac4d43 SHA-256: bd50bca4d3f23f579a05102f66333fcbc47dccbb8a513d71c84344830381598e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs, particularly those hosted on compromised websites, suggest a phishing or malware distribution scheme. The document body, though obfuscated, contains text related to merging PDF files, likely a lure to encourage users to interact with the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f82d3a5ca1f5519b8c753adcd352de67/35321951388.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/77f0fe798a82c78c3199a18542bc6afe/13096070414.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ptgrqtuhjvintqe7dgvp6h1qbj/6637507439.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b62c22d5005361640240b8e2df89f5a9/juradafi.pdf
    • https://alnahamgroup.com/userfiles/file/tifejakawirunozij.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b59f11f1d4---rivulugelo.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076342f18bc1---95716515272.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1865c3564---59747421051.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/5u1jq9j83ni0eg7r6h01su43v6/20414984485.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bc2b2ccf0---4921686715.pdf
    • https://alutat.com/data/file/zulebixunulule.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/vejudowewiwe.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac76e4ffb---jaxodidepezapagugedomo.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7urtli7ogliunjsrgi12reu440/54445655589.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160744179c87e3---84339103273.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/8dbb7a031c80b0f2319572a14b54b8b9/52340478149.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d7135e8f---40405415363.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/519ea9f40335032fa8847896128db3a7/pupowosavaso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pdf+bestanden+samenvoegen+tot+1+bestand+gratis
    • 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_off0000e965.bin
ad2dbfedc71a41bc3af84ffc362e25f2597cb75dca2aa1ad120f6cfe6ecfcb4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE965 5448 bytes
font_01_sfnt_off0000fbeb.bin
96a3a68ac7c1b3ce63b4e106a6507e741abebf81ca8bad2bfec7c19e6bf75d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 11520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.