Malicious PDF — malware analysis report

Static analysis result for SHA-256 158adf4d34748571…

MALICIOUS

PDF

91.4 KB Created: 2021-06-26 10:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 330d3d87f0eb1e351d5061c0dcae7bc2 SHA-1: dda1340874dae83b4d904b1ae1800e761adb71ee SHA-256: 158adf4d34748571a911a430864501709e34e2d4c1a4404e03a0031d59f43dd2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with techniques used to deliver second-stage payloads.

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://ketchas.ru/uplcv?utm_term=raw+green+aventurine+meaning PDF link annotation
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d7122bda8---lamanakibenatubu.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/vonutapenidupevefajapup.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/sowedupuz.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607165aa2bb57---17304751655.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/n5tt01m4rte8dl8di81s0aocl6/31106164033.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/27185607179.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/4362f754afbd608708b88251e03f7181/zenuvabakozavuxe.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/76592017700.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/p3io666f7ighjdqnp9u485e2r4/26239780097.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/mni4v47vn0tmifqqr7u5i7o8c8/boketomoseginaxuzidugeb.pdfIn PDF document text
    • http://beiks.info/public/file/21171823739.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/wigov.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/827a14a692827c46a62ebeca83a97162/wopagomixusavetivise.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/f0bc829bd52ba6840c7452aa61cdc2e0/72373975234.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092a8bb3a907---vigara.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/1e56bf6d6685303e8b4060498bd0b68a/12051213437.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/46623772186.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/vggp2n1g87imaif8098qs69qkt/dijadejexixasoredevatilut.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/kbenm05k0frtrm1eh1sbd26p35/87311098637.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/dad06b4b158a279eb4a9f5a8ceb73538/6761552913.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b971392e71e0754f28358939527c5aa/peleduwudobatu.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/fogaxidisazunupa.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1ee901141---64482844307.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e782a4d33---12269447442.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/6p467r8l8gk8bbjvpe4hulsms3/24504371349.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_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 16904 bytes
SHA-256: 5554c8c3589f362c2aed619903c3159e938f54c7c53ae6466c5478ea3562bb39
font_01_sfnt_off00012ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED8 10416 bytes
SHA-256: 283392b3e892fc90f9fbff20263672c9862740285538e5dc6c2c0d9c8cd7667d
font_02_sfnt_off0001467b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1467B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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