Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b6b0783ed94004d…

MALICIOUS

PDF

80.2 KB Created: 2021-07-17 15:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 70b353eb4d06a7b5b9fbe8ee5f13f9c4 SHA-1: bb3c64a376a2b8af4338e48a02d11f6f97f8c000 SHA-256: 2b6b0783ed94004d01d92d2dbc9355c70ccea3aa1119f8e93048c5b3d1ca80a0
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://myxroad.com/upload/userfiles/file///kilizegaxepujefo.pdf In PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/senam.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e9e847ce280d07a9fe1857e011863411/padexikija.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5388bba6e2---kuvefobotoxuz.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d65dad60e---86091968188.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ud0nmotrcm3ga80ja3vtj6h5cm/24024009009.pdfIn PDF document text
    • https://digireg.sk/upload/99856373183.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/bcb14e1cb6a6041e4e8985aa0940d499/57783467317.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/73236521138.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/1f7c2b011ce6332600421f3c1d8bbdcf/sobinimal.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/repefebizesegiwu.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609c25da57950---fitevage.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/28776935382.pdfIn PDF document text
    • http://billsky.ee/files/file/9759864326.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/0210e2a7607331322385c213dccf6d17.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a0813aef8cd49931dcc9f329d31c5bc5/34048170771.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a93e89eea5213618c7a31078a18cb355/jozoneruvigibeful.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/gitulufobugogoripixadamu.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/80258551170.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/nofelokovoxomonazofa.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/zafajavug.pdfIn PDF document text
    • https://fallsplat.se/file/gegulewupomogosadenuludi.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/b21749a0d0b8d87aad3698fd7859b267/kedopo.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/46255cf329f961208a0e859a271b5201/perizuxavozuzavadiwej.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/vebiveguwa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=3+month+old+pugPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 17756 bytes
SHA-256: e23ad74059db01dc645931df338c5fea9dd47712a4a4639a4eb120b38a7a78a4
font_02_sfnt_off00011d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D24 10360 bytes
SHA-256: 673ba48cfe00e0c09f79f0477d02d78e8bd258247f31b0aa0dafcc45410f344e

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