Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75f2e4c559d7cd7…

MALICIOUS

PDF

86.1 KB Created: 2021-06-26 23:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fcb3e17e07ac4a7e5dd16b248314622f SHA-1: 36a2fd7c28948238cdbc8e315b766e6a0b2fe32b SHA-256: e75f2e4c559d7cd7b6a3a8ff2923b0380d25de8d49e59ca54c202d192391fd91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to redirect users to malicious content. The PDF structure and embedded links suggest it is part of a phishing campaign, potentially using embedded JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=oath+of+the+ancients+paladin PDF link annotation
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee4db8a594---kamavovax.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/966194350d364ad1aebe559ebb0d2616/volosofagapupagaperasa.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/56a6fcdb444270f79ee4faf4de1465f8/83740926473.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/6c80m2lkb17g0n89j8micjuh8j/takopowok.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078b5e3dcf1c---waxikewifaxidemoke.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d19ff04a20---17376088536.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/66908869893.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ea5e68266---mamotakegudarerutiran.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098996260eb8---zedemojebifakorov.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/97228239598.pdfIn PDF document text
    • http://ledins.lv/cms/file/misibemejafiwasado.pdfIn PDF document text
    • http://erictex.com/ufiles/files/15718090401.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e0c0c4793ba5e4c3f805c8d3462861c3/pofijalutuzigudifijizogu.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/kumeposifuxexupozifiviv.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/nupagekezegebujijufumew.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/tefetegetov.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/58ccf287b0fd62faa964dcee290dddba/68006069418.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d610717dec---sufosa.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/87a992b3d12d824a6e8a319c24190b46/beragekonomixikiwopakufal.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160899160d90a0---timibipuzix.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/gmfvd2vgrj8o78kbmu8vogsa5n/25495838960.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/rumew.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/6a2ee3a98220eea41ec7151e49ddf385/2715919959.pdfIn PDF document text
    • http://normandyclassof79stl.com/clients/e/e1/e16d7b8530e96d8d426d6b963c92b0b5/File/xonabavek.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_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10878 10644 bytes
SHA-256: 11735b4bb9118d760b3dcc4fbddc009118107ef800e454171640f1922743b3b5
font_02_sfnt_off000120c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C8 16384 bytes
SHA-256: 2dfbe36872ad29675e78da89046faa0658efe04d50c3c2465afecd2bc4589988

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