Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd1d186cee62480…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 16:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5473844642132e5262382314805dadfb SHA-1: 6b46974742a301c865cf2614304760544de58ba7 SHA-256: ffd1d186cee624800f04cf85797bac69f898cc6d50be97ae26d32adadfc75075
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or scam campaign. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=memorandum+of+incorporation+pdf', are likely used to redirect users to malicious sites. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6941

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://drafthe.ru/uplcv?utm_term=memorandum+of+incorporation+pdf PDF link annotation
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/68420fb0160e8dd6f2cde80b3569a258/28802452978.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/508b7740d452555b4a4357292f551ed6/87235592829.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/4bcqhfe0t2vjg8utjn8h7l1dqp/70872233912.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/46259351793.pdfIn PDF document text
    • https://wrd13.com/force/file/rifetosudazorozoturukinu.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/37588464966.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/gufurezazi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097684d38029---51469768272.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ea6e63488---97139993148.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///bevefutone.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a7c50a708---karekojorediwe.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/23028778908.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c37426a5a1---35261421143.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/dilukavafofujigosowug.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/de5d550edc3545a6bb6c912306fac7e7/63739004045.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/6gavltv784150g1fm30n42baco/xoxopusuwizisived.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160761073e8d71---58856119282.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/90646561350.pdfIn PDF document text
    • http://hopsch.de/uploads/file/14188606149.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/0958680e2d006a0f6101734becc17470/zekezuvajizufanutegosov.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/pifepefuwagowavo.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/xedakafagikupajedul.pdfIn PDF document text
    • https://seger.cz/userfiles/file/78980498845.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac74a5c5d71---notazodojokabusiponeba.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA18 17688 bytes
SHA-256: d4ba31b135d0e8c0a43acbef456d1580550877c5a1ed0924e8b450ae7f9d872d
font_01_sfnt_off00010765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 10660 bytes
SHA-256: a34ded5117c076e279f206e2849c8688e48bf6dbc453aa2adb9bd4697f4219b4

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