Malicious PDF — malware analysis report

Static analysis result for SHA-256 70060b34ad6a8f3a…

MALICIOUS

PDF

91.7 KB Created: 2021-07-26 23:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ca43196ef32874fdafaa2e09c6b1f0fa SHA-1: 98592e5c60099b686c2163af784ebf1adcb52cc4 SHA-256: 70060b34ad6a8f3abbf5ff1dffc692eb799fa0d8c62dae32a2b10069a7142654
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure and the presence of link farms on disposable hosting indicate an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f10a029ca---87371893115.pdf In PDF document text
    • http://jkbprivateiti.com/userfiles/file/37628829240.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/lagizanekuparokudapu.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/wixegefejosimujanifonuse.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/1528285526.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/9e41889bf17d94874cffc794ae6236e8/xejikafavitalevafax.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/62406146356.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/mumalik.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/nirigaderowamibetevasew.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/kixejonuvuworovawado.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc55dc8d58---4631497820.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a099163a134---filazimijuxatiberazub.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3f71d7e52f9d78cdbdfe5e44470cf590/defobedanebotebidati.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/df0b1bfe46844495e85725f64c861c5d/99536581934.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16083fac4504b5---nizanubuwirukazogasesofo.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/957e943bb969c0895d1a12e167404f01/99280940451.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160830d7d54439---86104124214.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/rakogupululime.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/xoloxiju.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/vorapezidumukaxeto.pdfIn PDF document text
    • http://coffee33.ru/archive/file/lipobubepuwanar.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/7690eaa233abfa25e74fd80c8a9882aa/48220217008.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/vksg8st12e8k5u1jhvqhv2kijo/15086448306.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/33b665b56a9bce86f9ebb3fb5759add1/jazinososozavifet.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/gixixubugebulatirivaw.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6o4anmefo8k4qp6e44fjk2eh68/kitetugibedibojase.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160facbf654b79---22066869733.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+properly+take+care+of+a+green+cheek+conurePDF 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_off00010371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10371 10880 bytes
SHA-256: ef594cb8ac3337f8b55954438c6a7cca52ad2fb23ff293be97197a508bb8011b
font_01_sfnt_off00011ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B8 16744 bytes
SHA-256: 013aab435e7a4b1ea837ba07bd5f83bc4ee2a4d916c1f820804fe4c15ea4b469

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