Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e95e36b430401b…

MALICIOUS

PDF

102.9 KB Created: 2021-08-19 20:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7276ed9700c1714a384b9d7ea392260e SHA-1: d4d7477887cd8db9a608099cbba674809f30f332 SHA-256: b1e95e36b430401b2e11afe61b74a116a631ba84ba1704a56044dae07e04a27f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and ML classifier indicated maliciousness. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic strongly indicate an attempt to deliver a secondary payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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 http://hondatayho.top/img-ngocbao/files/rozen.pdf In PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6d7846b4ab---84745819694.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/xivomapobuwotumoj.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/15445052087.pdfIn PDF document text
    • http://gaineyranchaz.com/userimages/megibimusitekasi.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/ddab3486688a3e4037a7efc17c95afbe/46529322685.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160dc22f6123e4---getumifen.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d2cabf120---siwutejedukobosimu.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/cb1e1e8ff15adf959134af7c9d9f1a46/gagujogufebebokuwitokafon.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/81221879786.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/e96a6a9fe437ffff6e1b06db81a33a2d/xisejalibuvedapazoxazof.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a3e3cc41d08c3da2d466d9d3ea93dc4c/fikigigig.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/hb8ffp293gocbn6b079c61r356/zekuwasasazovukixafisoseg.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/negewi.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48dfb81579---gowupobifuzepujokenubi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160791b4d86a5c---6284789634.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/50226058235.pdfIn PDF document text
    • http://renovator.cz/files/file/28964247519.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609923ffdbb78---19554254344.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/mifemulopik.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/nejopeladinob.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/jorenozokale.pdfIn PDF document text
    • http://podushka.by/files/files/84081684372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+a+collection+of+clothes+calledPDF link annotation
    • 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_off00012ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000146b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B9 18060 bytes
SHA-256: 1c8c80f1d6b4730ac7e940c6438b5d771f6ef14e9668c2baf8d3eb688ce39b46
font_02_sfnt_off000175ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175EE 10464 bytes
SHA-256: a63e41e23a946dcf37b043d6d6e93b7a4536efee2568439e9e507a8f57077f96

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