Malicious PDF — malware analysis report

Static analysis result for SHA-256 8205764289d2739f…

MALICIOUS

PDF

91.4 KB Created: 2021-09-08 02:32:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 717b9c7b8f50f04f3d69ee2dacda9a1b SHA-1: 8e803448d322e1a3aac1d7956b1c3cff6cc6f45a SHA-256: 8205764289d2739fd98dfec88aa8068db30250190ab77035eb8ac7578377a718
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lavaecucebrescia.it/file/durumomoz.pdf In PDF document text
    • http://ifa-astrologie.de/userfiles/file/mobojibotabisamotakot.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096c82be66e4---3818678592.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/lidazera.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/voxusifikanizazezak.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/59707379696.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/xetelaranozajorukene.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/6lffc3u4ug9h69k12iesgv4gdr/jisukufuginomabosawasepe.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070de0626ce3---xijagizenejakofesasuxomu.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/gejadavurewuzom.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/jc87rj8q86oidn7sg0ilaisj8n/vakasofoba.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/95221888654.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/bojewixasumuvup.pdfIn PDF document text
    • http://gzmingjun.com/uploadfile/files/20210828_202508.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/57668164642.pdfIn PDF document text
    • http://kelvista.lt/images/files/sexoduvap.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/lefodaragofekojexobepuku.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/riperopipupofoparibaropo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/dc3f0fe8d1696280e4dcccc046790654/desuridojexobukavuku.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3daa134aee---15204847454.pdfIn PDF document text
    • https://panificiopasticceriabattaglia.it/file/62722569961.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/884077071a69c00e9493b5f369869480/pobigad.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/78029837954.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a0021bb0f---48819188235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=toragesic+bula+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 19796 bytes
SHA-256: 56754cd10732c7c70d0522cb28066f2dd877e5e0fa42bb74b2f413b6cdcdb6d1
font_01_sfnt_off00012f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F65 10796 bytes
SHA-256: da8784040dc32f33d1c2d5443a39eff55eea531be39ac05cdc8e17e2e67e7b34
font_02_sfnt_off000147f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1