Malicious PDF — malware analysis report

Static analysis result for SHA-256 722289d6c1e1bbca…

MALICIOUS

PDF

92.0 KB Created: 2021-07-01 14:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 378dc3ade39d31101fb0ae70d02cb89d SHA-1: b26503ba13ec11f5779a4882d11c10f6e22e62d3 SHA-256: 722289d6c1e1bbca21576af327216bad4b3b77967bb80a3c36bcb02edb5c073e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it is part of a link farm used for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/ta15he9t7gq83mv43fbrmv9jj4/87938344750.pdf In PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ecea3k92hc4j5mv13nipaodhqa/buzazodigutaputunab.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/tudizoluw.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/80bc730c78dcd752c0a2eace200dde57/tojufijireremadesufivedu.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/d010e2c20e4b39975767896df3672657/bufel.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2c929474e---78949568047.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/nawilopaveremezisulol.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160becde6c00d5---bezuben.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/f9spqgta6ln2vek0i240ecjqc6/bedadaxakitetokukowuzup.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/56f0e03f01e7d234b132d5582609399f/bafoxodilugixowofokat.pdfIn PDF document text
    • http://allasclub.com/campannas/file/56839453824.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a92e33e07fd---vadaxoludenedikejusijo.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/vowevulutawajej.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/75213072127.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/70588492134.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/e906a518a042c13d79c234fe5700c808/jexazokenuwemozumagekurid.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/77872347220.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160870afc69e8e---piviluvekoxelewazotosexe.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/xozilu.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202106/1624206556.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/e1240aa493a12455b814f2af896e0685/tovixi.pdfIn PDF document text
    • https://nevisnews.com/userfiles/zupunilexenanef.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210619184328_z7dxwy.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/61715692879.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160874d75a7408---sasunipujuxaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=bible+verse+faith+is+a+gift+from+godPDF 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_off00010571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D88 10956 bytes
SHA-256: 07dfecea69653f7ea23d051300b3ab7851dcd7a7cae421f41e044b15578adc93
font_02_sfnt_off000136c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C5 16932 bytes
SHA-256: 0b4234f504a81a27911c000cfc8ce39be4d645884197b659a634310ea87d565d

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