Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b3306982b01e63…

MALICIOUS

PDF

67.7 KB Created: 2021-09-15 13:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 129f893d8fa4d7a3387360182873a7dc SHA-1: d7c604912f214346b7afe5adf0083f8461cca5ee SHA-256: 11b3306982b01e637c3a369178350062f4fb12b7f6d1ed41dea055c64c8610f7
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further support the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://pixomot.ru/uplcv?utm_term=the+moment+you+fall+in+love+anime+full+movie PDF link annotation
    • http://rockefellersgold.hu/editor_up/makumudowubigalelibosevis.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/92627663023.pdfIn PDF document text
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/tulivudovatoxu.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/55963163375.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135eb8662c40---84031016310.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/sojos.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/pikanozitapixis.pdfIn PDF document text
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/mogadoropebofaf.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/8e93ae656fb685cd7dad995378bc3303/jenejop.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/tulafajetagiberirasex.pdfIn PDF document text
    • http://space-edge.com/upload/files/25783284856.pdfIn PDF document text
    • http://electric-kernbichler.at/73566437168.pdfIn PDF document text
    • http://exosushi.com/uploads/files/92996672843.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/97020247158.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f70ca6d20---35696782185.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/71260811110.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/75165125494.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/bosekovawewakafenanurune.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/94371845332.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/80127087510.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/nurowil.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/77f6bdadf73a9f8b4198aecb42898cc1/42032169653.pdfIn PDF document text
    • https://mp2020.csysadmin.com/ckfinder/userfiles/files/pubupisowofegopa.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

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_off0000ae5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC674 10456 bytes
SHA-256: 8ddf00b5ea89448f0e52ec6a32442ba71c699fd7fa6ce4774f3ca1893291b1ee
font_02_sfnt_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 14424 bytes
SHA-256: a279e80b7f30ea0ee9f0a2f771cb21fccc7ee8650b159d1b0f632b6f785f2f8f

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