Malicious PDF — malware analysis report

Static analysis result for SHA-256 6059618e89797138…

MALICIOUS

PDF

87.5 KB Created: 2021-07-13 20:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 2e67d05002d5c9e3adc902d4ab3ed172 SHA-1: f4fca454a5b5124988e4a209fc40cc31fd0ad2d8 SHA-256: 6059618e89797138e878c53bc67d4c9e1ae135a5a89ae50e28931d5d86a58a85
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF sample exhibits characteristics of a phishing lure, specifically a payment redirection scam, as indicated by the 'SE_PAYMENT_REDIRECT_LURE' heuristic. It contains numerous embedded URLs pointing to compromised or disposable domains, suggesting an attempt to redirect users to malicious sites for further exploitation. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=gst+invoice+format+pdf+download PDF link annotation
    • http://color-gateway.com/userfiles/file/55273062833.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911bd280632---rivaz.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d491aa52f6---tepivokutare.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/xelubeloxupijemaw.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082bca275a02---51294865850.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/vakufukejisugog.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/86205234492.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/a863ee4d870aa2323fbb358f8c741260/93425864850.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dbaa4a6a7---megaxulofezujikabamemujur.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160c61776a74fb---72505657216.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5966b9393e---mubimojojovuv.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/xopanamewesojakegakova.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/lks4a98fgmas1u9680dov7sldh/garuwivuwew.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/lipabogasojimugasikoju.pdfIn PDF document text
    • https://bloomeng.com/uploads/54479481341.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fd7863cc6---difexifako.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210611_36E293BE78F4E5C1.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c101b14c5---kagokibavuxojofivaneji.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/52594221040.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767c75d06b5---17345475470.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/67473695907.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/6543f1d04238c2b74c22445f7fa0fa67/jirowebomepivoxulitefuvuj.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/82434582050.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/pukujejenizenonuwiripo.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/pegolak.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 10972 bytes
SHA-256: adea8423e4480206d3484832bda95b7beadb47c8d3fe4920fbd347b4870b6c96
font_01_sfnt_off00010b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 17208 bytes
SHA-256: aec171e3a6ab12fba9530c4386933c724534e72af9828266b60e1b142be2fd2b
font_02_sfnt_off000138a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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