Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e250b8233836ab…

MALICIOUS

PDF

281.1 KB Created: 2021-06-12 09:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d1f32df0e9d9781ae2eed375ac483bc4 SHA-1: 062797376e873b2d9f9f51fe68a9c5b212777af0 SHA-256: 79e250b8233836ab84e0a3e2997553cf6530f77395747108021fdeaa33fa0fa6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple URLs pointing to compromised websites, likely serving as download locations for malicious content. The document body, though heavily obfuscated, suggests a lure for a free PDF download, aligning with phishing or scam tactics. The presence of numerous external URIs and a high ML classifier score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://crysiq.ru/uplcv?utm_term=passages+2+third+edition+teacher%2527s+book+pdf+free+download PDF link annotation
    • http://busanpc1.com/upload/fckeditor/file/tanejenuvovilaguzi.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/f3dc01ae1fb6fd55692da96bddd4c7c7/leduburezuw.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607259d1078b7---37183907726.pdfIn PDF document text
    • http://oicenglish.com/imagexx/files/6335835971.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/79c6ea92db6c541652ca54c19a81f8eb/kibosixovolulabinafumeved.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab8cb38b8---vebememiwaragopo.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/fc565d41e7da8424ce114904c0221df0/damapugumawunavikezala.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/35dcc0b9a45f279813112640c4362604/gesugekotigekusenez.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/70dde8c5457bc6d0a6df9e20073440d2/77754234783.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/36336774678.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/ab2c987fc2a4db62f8cef2c8a1a06955/268836765.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/ec409112220e6d1073319215a38099fc/4225148404.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dafea2d06---xuvokilavegami.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3a7602d74---fupudowazogovure.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file/%5C/55494480268.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/mr8tnoc56oo509vtc6bsk38pr2/sakiro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FC55 5668 bytes
SHA-256: 14098b39796ead19655cbf8d6f15397ed809c970e21d4d244dbb60147588036f
font_01_sfnt_off00040fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40FA4 14352 bytes
SHA-256: f074d1fc8b8d20e2fd8d78719f7ed8359df7fadbc565b370cfe6e66cb317f85b
font_02_sfnt_off00043ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43ED0 16312 bytes
SHA-256: 4dd54476baea8e95977730749914ee2a5f1a6ccb58adbad06d5dc92bdd54ca55
font_03_sfnt_off00045485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45485 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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