Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6cdec4cb56b6fd…

MALICIOUS

PDF

89.9 KB Created: 2021-08-14 23:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b0bf96fdb6d8c39f469bddf24bbb1a46 SHA-1: 90d92898b1b71021f2bf28d8542f79927ba85550 SHA-256: ed6cdec4cb56b6fd5469a2ce8d4ba246be93b516f246e963935e9576f19cede5
164 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It contains numerous links to external PDFs hosted on compromised websites, suggesting a phishing or malware distribution campaign. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to mimic an invoice or payment request, further supporting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/9f9peo3k8ekp635u1g2uo4vck7/xufulilixoxugisufalexi.pdf In PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/vavelodaxutipusi.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/07/24/vinera.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/29036500450.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbdb3722de---51921584955.pdfIn PDF document text
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/42058104598.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/sifow.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/kikowa.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2c63871b8---tefufe.pdfIn PDF document text
    • https://bamor.org/userfiles/file/34303616990.pdfIn PDF document text
    • http://m2m2design.com/userfiles/1222288758.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a41d1607c59---ponokera.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095c8e7908e2---5490170125.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/lurolek.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/7a39f7def7219a6f72aa0e0c5add24ee/31559041384.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/setudosexejokel.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/dd342c3a39d003ac0f5626eed524e25c/rigugusesevegot.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611371487e6c3---71157572161.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/2c44vujbcn9kvhtvd2qfln0ea3/xagusivuwatugofubukijumux.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/r25l79ka1cvc9591644dqs83ke/98588031505.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/rasure.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/79527477773.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/7ff299292309adabee046a55a14abc8a/84979283951.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/leligekigunavokasiwuvubi.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/c499823cbd922ae49ad21ab3d0148662/3965184824.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/2bh3kq0p4p7pvd3bi9hq48na31/33466016089.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+payment+receipt+from+my+airtel+appPDF 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_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 10848 bytes
SHA-256: fbd84f709be854a508c1246437fda792566a0ae54635f4ba64da84eafc820689
font_01_sfnt_off00011278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 17872 bytes
SHA-256: 29b1bff69226da3b7ad7eb5dc17d049c5714a3b9e9486bd564775bf71d895f02
font_02_sfnt_off000140cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1