Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d42bfa2d1185208…

MALICIOUS

PDF

170.5 KB Created: 2021-07-16 12:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f524c51fbee156199bf6863ec079d3da SHA-1: e6fa27600fb47068e58f35affeeadcfc01ac40f9 SHA-256: 0d42bfa2d1185208d4b56808260295d1dfc7579af209f3b943488f47174936ee
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to other PDF files hosted on compromised websites. This behavior is indicative of a link farm designed to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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 https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/53c50c8138e5e786044b8d965433e2d9/wexuso.pdf In PDF document text
    • http://ztkammer.at/uploads/file/xuneridepudimo.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210716_BEB35EF59EA9AF05.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c99d36d8a4a---wedudavoremu.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/8f11f06e33c5d75b118d5a25bdb56cf2/newepanitokorolojo.pdfIn PDF document text
    • https://esvigo.com/upload/files/47483747242.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/32421336414.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c5b9edaed---14914381974.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc67260f90---48100543078.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/visq7ar3tum5jl8r7kesmcihr0/59456324771.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/5d24gjt52l5ssf5865e61ju3c3/37327372975.pdfIn PDF document text
    • http://toonesk.com/upload/89548036772.pdfIn PDF document text
    • http://armanetti.com/images/pivotonej.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/fbab954e8940f5f856dc561221191143/jiwaxorolipakinizopu.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609f23a2cf672---18575478997.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/76167527867.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/86793800836.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099ed9fb4894---lukopekugi.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/78818017092.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608395ca1b01d---50087575711.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8fc202e93f7e14d84070886529f42997/geduj.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/rubuxesam.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4e2657b89c0a9398f7ad6221015cd4d7/jefavudumozom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+elements+of+archaeological+conservation+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23248 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00024a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A5A 22908 bytes
SHA-256: 7cacdf3ebc73a73358eff28dbeb072afcf1f9aa94b65ec9782c0d1298329f8fe
font_02_sfnt_off00028366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28366 11096 bytes
SHA-256: 8636bdf4a61d2c85f9eddb007b32202273ab2a3ab4cb0a9bf89b411e8462d36d

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