Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cd0ad346089562…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 12:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 864ba65c0b1be94e1adbe7c5d96e283c SHA-1: da21f65321ae64cf1ac78c419528c010b4296d84 SHA-256: f4cd0ad346089562da6cf2d56cedd803c5b0208f936505172636db597b6bebfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. Heuristic firings and ClamAV detection strongly suggest this PDF is a phishing or malware distribution lure. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://oniceh.ru/uplcv?utm_term=how+to+make+book+into+pdf PDF link annotation
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/edhphb10a47fmbf4tmg4q0dcjt/51204836723.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/9e3519fe5924ed31067a7b78c445093d/tijexugesot.pdfIn PDF document text
    • http://iworking.vn/uploads/files/30588564732.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/digixorojasoziraged.pdfIn PDF document text
    • http://inannamsao.com/uploads/files/zireped.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607820c0beb98---56733569552.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/suwulazogojabewo.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160f04c4ada112---pimasunemi.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd5269ec3---zusadavagunopikedajoferot.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/89375207577.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/bozewusogorupiwaxu.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ecfb8b4a38c6daa895f138517dff2e9f/31996387901.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/rebavamanafixuwas.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aab191d494f---bedesitevamiragux.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b20e2921e---negajepogufeforanelozix.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/judemali.pdfIn PDF document text
    • http://ediliziaunoaventi.com/userfiles/files/fudafelujopuv.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/929e5852c098821daee706a43e24091d/gofat.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/jewimelivorumokikinev.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/49913574730.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/45d8777ab9d35247928438d7a4940c26/89316653246.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/5493330031.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

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_off0000db5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF375 10656 bytes
SHA-256: a7975649a41bb59b04b8b152681d0fd0133e5b9bf7dfe8a1d56f1e8099295484
font_02_sfnt_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 18112 bytes
SHA-256: c90718624db8f2c4c0e4f10f8a90fc0268260ad6170e707cc0678e541a0128c4

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