Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8996f3e17d435a…

MALICIOUS

PDF

80.6 KB Created: 2021-09-14 02:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2af2328565746c9724030100b224840f SHA-1: 8e011c3ed50c9f3b40f750f4e12a6b12082114eb SHA-256: 4d8996f3e17d435a9269dcaaa68efa365d450cb23b4f7998fdfbb1f2fbcd1e69
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of a 'pokemon go hack codes' UTM term in one of the URLs suggests a social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://penzion-pod-rozhlednou.cz/img/file/sudetutoretedegave.pdf In PDF document text
    • https://belitour.ir/basefile/belitourir/files/42184814984.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/vabajezefanaxovoparudoput.pdfIn PDF document text
    • http://cssh.es/img/file/sasiwotalisa.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/raxudano.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/48439319587.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/rorerubireleraniliwebupit.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/52362742026.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210907_004439.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/48466692451.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd0a4525fc---44871207003.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/63187056540.pdfIn PDF document text
    • https://stopserv.ru/files/file/29594689692.pdfIn PDF document text
    • http://favourtec.com/attachment/file/94797699836.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/a1c42f6ec429d68f6f53beb5d71ad2e5/48876084146.pdfIn PDF document text
    • https://istanajp.net/contents/files/bezim.pdfIn PDF document text
    • http://househouse.it/userfiles/files/7562283042.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/sovegesisatinux.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/57876968326.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1631383924.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/xofivom.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/ponududabosusojubuxoku.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/gigekonimowa.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/b7a7184e466ce27e4c12c50b8c9966a4/jotupimuzojobo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pokemon+go+hack+codesPDF 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_off0000d6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A3 10576 bytes
SHA-256: 7546d0b65f6ea68aa45b96c1937cb4297f39d2e157d4eb2372fccba25cf7c12e
font_01_sfnt_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 18256 bytes
SHA-256: 193ba2259d17529543ac26f23e1af7cf72086fc228aba5ab4ca0f0a3b4703b61
font_02_sfnt_off00011d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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