Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a6b1272221a5d7…

MALICIOUS

PDF

82.1 KB Created: 2021-07-02 08:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fa509a5669cd4266c014479460a8bd50 SHA-1: f8f5c5bbc8dc9635dc4346220e1713fad6cbd24d SHA-256: 66a6b1272221a5d760eee479a5285bf37b0d702354a184dde70270c38c745c4a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised websites, including those using CMS upload storage. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://loctra.net/userfiles/file/favofel.pdf In PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/34906b2f20688a692f252ca1718a5b53/96819606993.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2feb93bd3---pekuzejazutesip.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078112ef402d---zujejumewolopapazidix.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/40l2j65vs6m18vvtpjuh15c6lf/46230975878.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a24b5d2a0a2---tofixijiwikujevovotudos.pdfIn PDF document text
    • http://dogable.de/userfiles/file/bazab.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/93ae13472085239be58c467fecc0a31f/jaleduwibidigumamukiwutus.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/79617255603.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/3qlhkkat1a67kihkjp15i3s4o1/19319969485.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/tebiwapinuwofisigefedap.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/sawosi.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/sulapalufigiletewafu.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/33419084666.pdfIn PDF document text
    • http://ezibra.pl/upload//file/70422116427.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/43864425765.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/73417172010.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a6efbee553c---diterorawovafituguzukedaw.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa7008af04---48403442872.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1b7a5e280---8995568184.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/34522047615.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac60f644f9c---bepola.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/631fc595be876689b14ae35a35cfc54f/77316778668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=hdfc+life+share+price+nsePDF 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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 17180 bytes
SHA-256: 79e734ac64391bbaf32a90e4ed1eb23b6728df4222b69b2db50443d7f22e8975
font_02_sfnt_off000123d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D0 10488 bytes
SHA-256: 1af7177ee17789312da9bb8aedbdd901743d73702673119dad15f4d5dc3f8777

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