Malicious PDF — malware analysis report

Static analysis result for SHA-256 19cfe9fcd0c59168…

MALICIOUS

PDF

85.6 KB Created: 2021-07-13 12:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ebb183ec5c69a959f8d3531cf823d4f3 SHA-1: d6192a4f69c00e19f54cbf54422e533a3674f5fa SHA-256: 19cfe9fcd0c59168b0377029f5c457990ba211b0e66f135201fa802e22fe1398
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

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://huntic.ru/uplcv?utm_term=betty+boop+cosplay PDF link annotation
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9a63c1e85---kazijojed.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94d75bfb48---kebelirenoriluku.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/60837719943.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/nemak.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf1644f20---sebozamadovupojurav.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/gonedibazariwaduxadubu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bde69813160---tebur.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/36231241885.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/losowevaxug.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085a56bde2c4---winekigakaxanunefujo.pdfIn PDF document text
    • http://inncredel.com/uploads/47875580990.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/luperavomawumipunadez.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/wakusiz.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609909a738b3e---wefanujaxopunaboj.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/resoxutomagozug.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160785f3fe9ca7---kiwutigemel.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/57193538832.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7fa9485da---tazalu.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/dca45dc062e90fe25f011f5ccdd75926/nojibarubivokol.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/f47ed34c13c144ab6c404fdc7a6119d9/54684363837.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/06553717ca383239e81f8a040233ccaf/34028806227.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/54159648784.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/rojugefijusosoz.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/27830235839.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/45021909351.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/5286196946198e810e3faaeecea4ecb8/4783913672.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/bb5d58b644fdbcccc7575c1631a4d530/danufavomopopigezuviwato.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFE 16936 bytes
SHA-256: 325d61c3963c1ec69ae4f7f5ec1bd68b580837bf4a013aff29e8d3a3785100e2
font_02_sfnt_off00011b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B03 16336 bytes
SHA-256: 47d6f68e1005e6641acb9d8903ddb6bb5dfd30cee0f01f0faded011c5708b1f3
font_03_sfnt_off00013132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13132 10376 bytes
SHA-256: 41e64edc635e0cae34d36d3bbbb82c0ac792c046ca6d321182846295f31c2864

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