Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e36903325c537a…

MALICIOUS

PDF

83.8 KB Created: 2021-08-11 23:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6b6503f0215233567ee5d8c2d330572a SHA-1: 8d03b9956362b4fb70eb8400e46ead1d8652d7a7 SHA-256: 54e36903325c537a814c057b8af0f45b89a31c040e75768b6149ab78e55af2a1
204 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious payloads. The presence of a 'password-protected archive lure' heuristic further suggests that the user is expected to download an encrypted file, likely containing malware, after being tricked by the document's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=psp+games+naruto+shippuden+kizuna+drive+download PDF link annotation
    • http://eiak.org/upload/editor/files/rexififivadudojevu.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/vuvifufasiko.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/jejotexebafagilexumabi.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/92192914686.pdfIn PDF document text
    • http://ckpak.com/fckeditor/userfiles/file/36650951496.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75834836681.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b762b213dbc---ripedotiw.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1784c475e---79845387312.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/65128834741.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/puzekefajujaluran.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/2978npbit03fmoj4pi716psgu5/13467028391.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/4b02828c53309ec8d15f3e1e70519b05/marori.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160862a93b4d66---95858501261.pdfIn PDF document text
    • http://simonide.org/userfiles/file/defirenoxepofis.pdfIn PDF document text
    • http://ssujaxchapter.com/clients/83257/File/lerabovizisabasidid.pdfIn PDF document text
    • http://protok.pro/upload/files/71878264406.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/7d7c73de3890b5e0732d48d6b408258d/22784668439.pdfIn PDF document text
    • https://vleek.com/uploads/files/geribofa.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/91caba71832842795ff51a1fc80658ef/31829061613.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5fpfrs80srjcoo7mg4pr15sqgp/dalorex.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/c7b7ba23a2f2c03dda9d2af1ea6c5c94/pebazukusiwizorezida.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/81319040038.pdfIn PDF document text
    • http://eurekaloggers1970.com/clients/a/a4/a4917853023b9a70bc4506ca58f09c65/File/puxufoxufawarasaxugokipu.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_off0000e13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 11244 bytes
SHA-256: 0cfa761393c55c04a666c1d066d7374fc445bb0f2a699c3622e8c5cbbd2d1862
font_02_sfnt_off0001135d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135D 17428 bytes
SHA-256: b9540004555a624ea787ef93103c01680cc03c43170e8e1d555161e14c67bc1c