Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c695d7e5358d06b…

MALICIOUS

PDF

77.5 KB Created: 2021-09-04 18:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa116d92e48577f054aedfbe77522ecf SHA-1: 7df2e2b267a528b77ffc8dfaae8447e00f843fd5 SHA-256: 5c695d7e5358d06bdfdaa736c2294f3fe109ff1ba2418094a43b17f9ac362fc9
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URI heuristics and link farm detection rules reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://infrive.ru/uplcv?utm_term=poulan+pro+42cc+pp4218a+manual PDF link annotation
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b523cb96d60---70351229946.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/vewamafebilajega.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/femabasibi.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/vsc1ogjmdkcltjtvp8eqbhneb7/33622417121.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610968400329b---dozud.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/87782185956.pdfIn PDF document text
    • http://zaiger.ru/img/file/33539665600.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/51416458111.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607084975ee15---10753495345.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160baf74244443---76399914841.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610649d39b6c7---51918356073.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3d5a4be0d---dajumedo.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/totilotufubifaxazowolixij.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/1442377523.pdfIn PDF document text
    • http://planetamama.ru/files/file/dafuk.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944966ce26d---12806184356.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/sikoboxefogonaxibite.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/aaec3cuki2nb0kfgi0a624e36k/mezutevobodiwave.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/raberixuwiloxozagaki.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/tojajus.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/tewufowavilesawazum.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0762888001620290035.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-29/20210429041500351919.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/6289a339b84aa336195123b318741d88/bevuwovuvilenogarogatoxu.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c154de80f45---wesovad.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b739ff5acbd---38642731913.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_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 16412 bytes
SHA-256: ac2c91ae8ad503e3a987604fbb2dbb09568c1237681d742346943a6f48f00759
font_02_sfnt_off00010fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 10604 bytes
SHA-256: f8413479a269d0140c0146d40e5ee14f7a131a648ff4ceb06c2635b040f085ef

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