Malicious PDF — malware analysis report

Static analysis result for SHA-256 3466c82b9c9e1e7f…

MALICIOUS

PDF

78.0 KB Created: 2021-08-26 06:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 622978744a00c8b5e980f35ce46e9959 SHA-1: 5e49b5545630c88c5cfd94a3c4e54c72e57d722f SHA-256: 3466c82b9c9e1e7f5af28dd22ff91afeb8c8dc31eb05876283b1fc106d89f3f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous external URIs and link farm patterns, suggesting an intent to redirect users to compromised websites or phishing pages. No scripts were extracted, but the overall structure and URL patterns strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://oniceh.ru/uplcv?utm_term=ouellet+thermostat+manual PDF link annotation
    • http://sztarmedia.hu/_user/file/losuwiguliz.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be80499168b---22386873777.pdfIn PDF document text
    • http://juha.be/_files/file/4958841093.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ef6771b8655819a4cb00c2f0d5583e98/37060597942.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d7dc0e5a0---85110840564.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/v2vcrbk4d3lge9lte87k01c2dj/zumejuzimafupop.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/57217286240.pdfIn PDF document text
    • http://smitheaster.org/clients/861344/File/48774067104.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/50715093290.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210719121153.pdfIn PDF document text
    • http://mebizstekla.ru/userfiles/file/9214465615.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adb429b7e2---zukewupe.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160818f83dddc8---24631184553.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/peximaxitizugep.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2154b78db---diditipiturinurikofuxuriw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f66185814e---91169181288.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/14271102295.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/hbtpv6u35im6vvpjosf03v9d40/24844618275.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/fezilodanu.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/70935776078.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/e422037eebdc0d058c62831307d91208/seluruxutasawiduli.pdfIn PDF document text
    • http://tumonjfk2020reunion.org/clients/f/fe/fe8b949e9fe7e5065ccade199761aacb/File/44049155950.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/97665722882.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13772372823.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/dakumoruwav.pdfIn PDF document text
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/bataresosepemovuzaka.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/pazanepizogidupumup.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_off0000cbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C1 10408 bytes
SHA-256: 1b5e2db725cc15be38bff68bc68913505b0438831a781d35add3174750a130a7
font_02_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 17724 bytes
SHA-256: e9f2b0da1637bc90fe955770dbfd77a3e1c278881045d2ff00c367b8c1863dc6

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