Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e5c0d25ca5e851…

MALICIOUS

PDF

85.4 KB Created: 2021-07-17 23:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 14a4ff6e4ed3db1d2a9abe6aa3733003 SHA-1: bd6e70726787b0e1ea1dbd6b4e22d80dbda5a0b8 SHA-256: 97e5c0d25ca5e851b5d6bba995b5405bff686dfaca1adf78cbd78c3f962d9da2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and disposable domains. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/3c5585dce5361d0712de21e3bb5ad740/81957145135.pdf In PDF document text
    • https://aordonez.com/images/contenidos/files/kobetitenanizokudegowofe.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4f962c3ef7c1bdbb1c7dcac31d9021ef/ruridibiguvilapela.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/43814323575.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9069c29e7---gukojeduwuwoxitozaruget.pdfIn PDF document text
    • https://akemi.ro/hirek/file/75580339064.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/88821432686.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ae0d6fb55---10634090937.pdfIn PDF document text
    • http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/wevobabuvubejadugasuruzu.pdfIn PDF document text
    • http://hkalc.com/userfiles/73367952275.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a31c4039bfe---winosotejiv.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/9d72f1f37db9a65076879ee7b5d1764e/78726687971.pdfIn PDF document text
    • https://pisangmanis.com/contents//files/87784534468.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ef00054c---wukegenobaregudodase.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/dapowezajabomagurewifupuv.pdfIn PDF document text
    • http://rsst77.ru/upload/files/ziwevirewazuvuvawemanozus.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/uvs64t1a2nk9o8uj6v02oip4a0/fikoku.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5510447b3efe426ced013e172b73e643/vexosigoruzugu.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607205fd2bc5b---rasawogop.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073755e1b327---21844735170.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/vijivovukebagiti.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/sosefuxerexufaka.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/19501377340.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/roxixewawalakijebiwe.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae712e78e75---15986371416.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/zabosovezexuzelajilubizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=xbox+apk+for+androidPDF 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_off0000ecd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E8 10388 bytes
SHA-256: 8aa98247660033a6fdb3a3a5b58677c4caef1fb29fcff2703238072711a56d1c
font_02_sfnt_off00011c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 16964 bytes
SHA-256: 1e827117866238a446ff04f62a75d00beab75372009019b435ca56064ec5440b