Malicious PDF — malware analysis report

Static analysis result for SHA-256 6462d8eec8ad10cc…

MALICIOUS

PDF

92.3 KB Created: 2021-07-16 05:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d8d20707d364e779756c656efcbe9670 SHA-1: eff14468b52bf21feb15c8965a22d6aa39d26e4b SHA-256: 6462d8eec8ad10cca3073ffc0ba4fa850e71e8d0d31f2a9a094859ff9686ce83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to potentially malicious content. The PDF structure itself appears to be a lure, with the document body being unreadable binary data, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/m734v13rhb304854o88l5oo64n/wefuminegobokabugukovawib.pdf In PDF document text
    • http://camionespanamericana.com/userfiles/file/82609223345.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/37303834518.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b08e3f671e8---62500250876.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/19121565704.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aab30e957f9---18779334501.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/78285504520.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/70bc7917c91376ce0e48b78256b234f1/37124411816.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210708040550_shgwew.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4n8im8mjhnet97k6o77tffmoe1/pezipogiketenot.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a510bd9e613---vagogozedidalalidu.pdfIn PDF document text
    • http://hyundailed.com/upload/editor/file/kalabijutokobugop.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/zowijowufipaneneri.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/57432610267.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/54459c612b5f285057b57d9adb64e4c6/3344004069.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/folokulefemukixan.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/7267b732888d1a13f6cb838cd4ef398d/kunume.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/93941236282.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/1386984222.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/fgnpmm2pq5pa7db3uq2l87gn37/54226811589.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/20000647263.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/vupalogusil.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/rukopabudisapen.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4tlrmnoouqmd6g1pbl1oklj3h6/45354789586.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/68987280182.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7a5ff3c89---27218211259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+clean+acrylic+paint+out+of+carpetPDF 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_off000105fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 10596 bytes
SHA-256: 983d470db6cd17a8dae21fe7d04297864f65e025836b74ce9e86ce6699235f3b
font_02_sfnt_off0001366d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366D 17328 bytes
SHA-256: d541b97bcf4f073c9e169f5d7d82ade5b74182c86191928076cbf5db849fcce9

Open this report in the interactive analyzer, or submit your own file for analysis.