Malicious PDF — malware analysis report

Static analysis result for SHA-256 414b69b2ff8ec425…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 09:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6ebc7c452ad0aae5c521da1af9c1a3fc SHA-1: 349468c26489ae41bba75ca3583b83ae4d2ae6aa SHA-256: 414b69b2ff8ec425ccab685a115feba8407cb42f44f616c3714a7a019af29184
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised CMS upload directories. The presence of 'utm_term' parameters suggests a potential phishing or SEO manipulation tactic to drive traffic to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://diversecityuk.com/userfiles/file/xijojaji.pdf In PDF document text
    • http://gapoom.com/upload/fckeditor/file/mufum.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/eedf9b6be89cf2b721606c7b7a5ba2be/50999091202.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/615f2819a290a4312991f96812651c62/jetudabodenajubo.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/0671e6de6090c9f80523eff6c2974b27/73078721623.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/c3f4dd3b428daf6b8b6f0eebeadd923c/20293118925.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4ba37010b---59280507977.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/4236651319.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a39cc2cf3c4---10789872744.pdfIn PDF document text
    • http://generaldistco.com/images/file/lotumariwofotepud.pdfIn PDF document text
    • http://oceanstatevolleyball.org/clients/879495/File/powulirizomogujomare.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/xadafem.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4e5813639---zasisezusujabi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16082697e82d6f---juvatesatoto.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/zuramoxagilusavimiku.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca06a763543---1669901711.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c37713ee6b---bikebobo.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/jumuwulefekovosinef.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/nelawuxazurolezekanaj.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/53387f583b47c258a39c6d274c8c0f65/masovadolutozi.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/ab126e0e599ca380a692764c47fc990e/88336870121.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/36671671346.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/b0qh8ca3utl5slpgrt9ipeshi0/39564179183.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/8d331e78ecf945e20d7fc5bfadd65c59/zomosuwiboremozetiza.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6d39a4f79bf46bc4ee6f9a465a6f5764/21818940566.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16119f2f26cf50---33514645606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=rules+of+narration+change+in+english+grammar+pdfPDF 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_off0000e149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE149 11212 bytes
SHA-256: b14d25765b99d15fbb53b315979e35df19c81d9f2f54173fe3f8a7c7553e6f38
font_01_sfnt_off0000fb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB29 17492 bytes
SHA-256: ef5bc05f2f5df43c14c69d851f20cd585c8137960d514de1e73eaf4801eb461c
font_02_sfnt_off000127e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1