Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f442976bd5b5015…

MALICIOUS

PDF

86.0 KB Created: 2021-07-05 22:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 220966725495a38981b7ad18b8ce4b60 SHA-1: c32b11dd50dcd8d0c9faab6bf5af4754c487877d SHA-256: 7f442976bd5b501552694a6a525c709502346f949760efad572bf387c3d9c8dd
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41f269d9e9---84203527058.pdf In PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/34931069360.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba722b6b3ab---rizofifub.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/55168859832.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/xexodaruzejem.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/7999546ac7f79cbc922fab36d44a06d8/kefok.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/oposbvbu20cttrn0h51s377656/lizod.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/017e1b4ffad91b92c261d1130c381551/fijamivina.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/12165537362.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776cf64b785---zanibaj.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/kefomesuvorevimutodutero.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/simuvosizifinedatasezet.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/81101079455.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c19006a4a54---duvuzixozelaluzel.pdfIn PDF document text
    • http://master-service.ro/images/file/gifolenesulosizu.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/77fb34ec76d39d33c264556cb84e8df8/gurasuwa.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a42d1cd75f---27559916663.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ba57f0ac789---94301857175.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/811vtdtoplre5np1e8bm326r17/34398709285.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe7e28c5a1---54673410525.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6fd7e43fb---funozukizep.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d4a486475---32411557508.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/33d36e3c10b078d954b44bac7b052c91/30337825337.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/5d515e3a854365fb71e43f8dd8ec8cea/sujusarejapamovixolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=who+has+whose+or+who%27sPDF 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_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 17612 bytes
SHA-256: 4c7e2d6fefd76d65785162afe491b8f9e0c4b6c118d30977fefd224cee0dec18
font_01_sfnt_off00011b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B00 9976 bytes
SHA-256: d748622666f989f91d67d429c83d6dbc5f3a0529f5cf39a21ed7ee38643b8c2b
font_02_sfnt_off00013161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13161 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1