Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b699000e55e7cff…

MALICIOUS

PDF

73.5 KB Created: 2021-07-05 08:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f3f53355fe5c6f913ae0912bb6cc358b SHA-1: dfb2b36044cbeae298db71c26813bc9000122de3 SHA-256: 8b699000e55e7cff0c608b4bb492483f7122050031d70217888da547958ea3d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly indicate an attempt to trick users into visiting potentially harmful URLs, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://langfordfinancialservices.com/userfiles/files/notalukefilezejexad.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609c70c587a05---nekapotimurajixositu.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/vowak.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/zulafenusubotolapivu.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070dbfe47680---69522970224.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/41315795477e8ab2d418e52c87e9c1b6/98188041260.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e05dbe6448---54835925284.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89b269042d---79421111674.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16090a553d1d15---gutefipaborid.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/46210633507.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/280066855e4b338868a89038d6181be4/27520527310.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/33235284727.pdfIn PDF document text
    • http://moneymaker-gold.de/files/sipopilavegakola.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/c85445ee3c404148e6fe319a1b5bdf58/24267722838.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/1egjdfrsk7ka3f3ncb9js7fkq4/29774257858.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/42751254554.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/49682023962.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090536f7c48f---39257354791.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/82140837320.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/kulil.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/8460826295.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/novazakupezoxobip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+meaning+of+absolutelyPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE87 10880 bytes
SHA-256: 29309c405c54deb07a20213a82b4f8ea525c0bf30f59ece452747df0cff2663d
font_01_sfnt_off0000d782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD782 16128 bytes
SHA-256: 900561a5326124dd1c96316844357afcd5b0d4e75a0c22449c0e9facf9da6c13
font_02_sfnt_off0001009f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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