Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f987cc94badb31…

MALICIOUS

PDF

77.5 KB Created: 2021-09-15 19:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b1cd730885b10a5123fc8a545cd1e557 SHA-1: 950cea84f00b6a4fbe49ee1b7d13abc6806328d6 SHA-256: d7f987cc94badb31a3b0e372aafd0600b97375e2fbe196bab9d4a755d0c4991e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the heuristics point towards an attempt to exploit users by redirecting them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://catamma.ru/uplcv?utm_term=notruf+112+apk+android PDF link annotation
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161370198909ae---41621185534.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/51529257675.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161369bd82210c---wukugunogo.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/funopodasixurezubuxatin.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/sejogejazaxinejusovifu.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/918a56d2b491d309cba87778a8a2972b/46877689718.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/64635442696.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/16392812503.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/51462655680.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/puvedipulekiwulevinisuv.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/dejetor.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/wizevadaletob.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/daxowomufovopidanabu.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/mowedifaludonireregil.pdfIn PDF document text
    • http://didula.com/img/file/20613331405.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c21eb8ae9ef59970a0e0d3e4ab8a2a8d/42607986885.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/b747c1f6049258ded6e261fc196d76aa/14684828885.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/71010456036.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/86942032314.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138cfbb66b73---37041384344.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/bubovezijinivivafarofidax.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16136a60a5eb5c---40455697701.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_off0000c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 10488 bytes
SHA-256: bca497e00ccb20a0dbbb4f13e6480eadda37ea5d790eade69327b399eb0a44fb
font_01_sfnt_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 18292 bytes
SHA-256: d37fd4907bf4b4563c91a78b0508257eef5e29d98ddf0d58b48bac1436d0e3b9
font_02_sfnt_off000110d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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