Malicious PDF — malware analysis report

Static analysis result for SHA-256 567e4ef155f7a05d…

MALICIOUS

PDF

83.6 KB Created: 2021-06-26 03:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9fe0e2caf328b9d335316e485bcda6ef SHA-1: 0df2b778234b507c7a3380f4e75c1e23c53813e1 SHA-256: 567e4ef155f7a05d0fa15789d7510087ae15c01629ed3ffbc7d33e12281c603d
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous links to compromised WordPress sites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a visual download button further supports the lure-based attack pattern. While no scripts were explicitly extracted, the nature of the link farm and the overall detection profile strongly suggest the PDF is intended to exploit vulnerabilities or trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=trainer+lord+of+the+rings+battle+for+middle+earth+2 PDF link annotation
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0n1kngp053nffja6ce28s2vj6/gofilarutovujovuzafe.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/65ca2b44bbc42bb5af70a8c7751a36f8/pelalowatigadatawuragi.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/e212a8f4af74dd6bce3f52718fe7cfc5/61927725202.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdb3ebdf95---37501604667.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/dugenoxunezeboki.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/36806655223.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/39112ec1834d05057966bd0a3b4c00c2/mumukosezev.pdfIn PDF document text
    • http://abwessex.com/uploads/files/51739220006.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a236b998f53---dasopujinifetiw.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/3af4b0007d9efea709abfd78c4d2cecb/43162375499.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160888f04422b5---60086332688.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/xuxomilefujaluner.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/pafal.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/21619575349.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bc2d79237---sexesevixuk.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/6cb4e3b93a9a7383457f06d4361a1b8d/55460689794.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56d5e20209---65649372153.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/55497974331.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/57570161308.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1a8035d66---83653033895.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6rf0atgsod4p8tog1obm7jlub2/51469709724.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/17687810083.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_off0000d70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70A 11024 bytes
SHA-256: ca55474c953fce979944baaf41dcfc8a1229e7b9d3ef6043e5bf92ce9e9d0e4f
font_01_sfnt_off0000f043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 21368 bytes
SHA-256: f155a93e6ae0cd35deee79fe1ff93f5586391c951b5dbdcce8d0a6af154f3690
font_02_sfnt_off00012704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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