Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ef589036a1d9c1…

MALICIOUS

PDF

84.6 KB Created: 2021-09-21 16:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eff46b2e38c8ce74383136c1597bc7ec SHA-1: 99d5c0609cb73d173a4350bfea822d2422addbc0 SHA-256: 00ef589036a1d9c1ef4c2dd8f6f43621622dc61338a390e0509d4f102262fff7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 multiple URLs pointing to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. The presence of these links and the overall detection indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac86ca75e7---61209101229.pdf In PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/pimasepamarodugodapuzepa.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/96684192731.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/51814598836.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/52362699262.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/72842598722.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/fegulimuwin.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vuzoruxamiwilivulam.pdfIn PDF document text
    • http://santabruna.cl/upload/file/11739680270.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/58062363425.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/66036432061.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210907084855.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161494d1fd37ef---xutalegabupupanufelemot.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/77501199973.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131814e6132f---fitaguxitareso.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/62816532995.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/257b6bd7383ade81b1c8116c2f71edd8/luxelekeforizije.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/9012896412.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/sos1f9402s1bjpdq9cdph5deif/78809584445.pdfIn PDF document text
    • http://artattack-concerts.de/files/file/25245042924.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/33513720277.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/tazagewapovazomi.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/39129345727.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/bupumotulavaravona.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/90404266261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=watch+get+him+to+the+greek+123moviesPDF 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_off0000e296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 18684 bytes
SHA-256: 2fc649b904d9670f64968c5cff47bb94598e1f48ae0b52a7df65dc01ef451ee8
font_01_sfnt_off000112ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B03 11020 bytes
SHA-256: dc2d5259946ec92205204626aaac11b13916119b3702817c263fdf0375227fa2

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