Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4bd7cb9305cf91…

MALICIOUS

PDF

97.9 KB Created: 2021-07-05 06:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cc203d5a3d83867c37914cc974d6862e SHA-1: 761e421cc018202233ee3ba959df25049b0d6478 SHA-256: 2f4bd7cb9305cf91ef777b4f23ed0df36976cf1e54dbb909a1bea32bd2bb4e12
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://fitnessklub-impuls.pl/uploads/assets/file/nidigopumatagilovune.pdf In PDF document text
    • https://kurtoglumob.com/upload/file/bodutifuwuzoriwiwupiwa.pdfIn PDF document text
    • http://apsons.eu/files/file/38568698226.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/12150030285.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4fa051d25---zozejapodosefafaxitafuso.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/72398800491.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/84049533308.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/rigowavogari.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/luturawuvupupovuvo.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/65a347a1f5bb649b45e0cb930c41e0fa/sokabewuzukabuloserime.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9c90b6759---pafobavefosidabopuposu.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210618195501.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d3b3a22613a9f5702d4ce32977979e78/zimowixasisetepasu.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/36382999066.pdfIn PDF document text
    • http://goref.ru/files/file/44584330572.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751e8f7a40f---27032559006.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/54d3d17cd9dd43afd1c4d8de7b1cbe25/90633849546.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/dd4ace0a983bcb8fda67c54dd3e0bbf5/fijeguwizo.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/vn2aiasvm8634kg5rukv5nlvb7/96447331746.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16091829a5e70a---zenininutitimojawaz.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160835daf34738---37358177419.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/vmh4f82khojpjgf5a9637i961s/56662987102.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8fb0ef954c904980cd713714253c361f/69193596857.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/54895812597.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=just+a+fling+charity+ferrell+read+online+freePDF 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_off00011722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11722 18996 bytes
SHA-256: 267b3c14c4f87541f6f18263f0926a4e08fcfc0b64ab1fc9a410e49ed3643247
font_01_sfnt_off000148c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000160d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160D9 10960 bytes
SHA-256: bc6a36743de966d3cf19e5d151f5f95832d3933cba2f3ca325804fc0d5944c6f