Malicious PDF — malware analysis report

Static analysis result for SHA-256 9614bc0d5b488dfb…

MALICIOUS

PDF

76.1 KB Created: 2021-09-10 18:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be9dcb35ddccde35c250a6375027dc83 SHA-1: 1301d5cf5ac79a67bad1265edd57a5fd65e11ffd SHA-256: 9614bc0d5b488dfb15f3d6d993eb9ca3f1386c924d1ef313628c843ce04e3489
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised CMS upload directories, suggesting an attempt to host malicious files. The presence of a 'download' button heuristic further supports a lure-based attack pattern. While no scripts were extracted, the overall structure and URL analysis indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://akemi.ro/hirek/file/68236630105.pdf In PDF document text
    • http://dragonera.cn/admin/userfiles/file/vodudawabopebiwulezisokil.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/xexodozo.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/47684487877.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/11348566253.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138ce2cf2986---zapasedumasojeg.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/32297741979.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/kizaxivebegadedapulez.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210906_145934_100.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/30405087457.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/gamugatulefoxova.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/zegovoti.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/c3d49493aba8bd8773a14a12d99e7bea/13934844956.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/darujejozibojulafo.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354de99d0e4---novapax.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/52407727472.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/92268786603.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/nuverazojovutumelemiso.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-04/images/files/rikeriwebopixijekipowep.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/10284385424.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/dezujijoromojixewofi.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/nuredabikifupova.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161344680b7e81---foketulexekubelozepaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+game+jojo+mugen+androidPDF 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_off0000c5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A3 16860 bytes
SHA-256: ba46b799c448f315297e057459929bfbe92bf43ed309f4e3e9fcd05e08d3c753
font_01_sfnt_off0000f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10A 10644 bytes
SHA-256: 5d01a3d5da9414d04916dc6d47fc79119ca7c684c01c47f59ebcb850035c2e4e
font_02_sfnt_off0001091f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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