Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e76aa6d368b7750…

MALICIOUS

PDF

99.5 KB Created: 2021-07-06 21:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4d44c8045b6aaf68bb0baca19293497e SHA-1: 8c64f79e540c9523aaa18a9ba58393634b1f8a33 SHA-256: 7e76aa6d368b77508b4e26a2b00f6618283379dc584c9a6bcf0a788dc796bd20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the nature of the links and the detection 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://queure.ru/uplcv?utm_term=things+that+aggravate+gout PDF link annotation
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4daab0247c---dajinisabobi.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/dscqoh6ngiivqt0g9d5gpia7k7/loxadosagaxadaranole.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/xolavobadopivobufudu.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ace1106947---nijezabagamuvezexunen.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/wuxakupi.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609a555e08df6---jurob.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/95292461326.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752d5a94c02---92038903448.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d53f70e4ee---jujod.pdfIn PDF document text
    • http://attlas.center/userfiles/file/38339062277.pdfIn PDF document text
    • http://sherylrobphotos.com/clients/56056/File/12194466583.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5891c79ee---80647335554.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/e5tsdb7uai1bg2psj48t47p7qc/feluwepewikevalukufepe.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/80218242533.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/9b5q8ornp8are3nrrruiqm5n12/60247168989.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/875cb67e557c0e8c035f1d781b9136bc/seravatozavufinawekikeg.pdfIn PDF document text
    • https://naoshima-habitant.com/66433371355.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/21869435596.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/42279117900.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/97060421615.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/22787564118.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f8de107e---lixefotesanetuxomo.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878476e7912---17521387914.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_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A52 17372 bytes
SHA-256: e5dee9a6e91313b4c7e3643c208737a3dc18b7366e9d57b62bb3f6de20d39b7a
font_02_sfnt_off000167a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167A8 10468 bytes
SHA-256: e164bd84044690bc36a82b207860fe02e6a22c93c9cd71941139c1fddffefbf9

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