Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75392ac732b2bbc…

MALICIOUS

PDF

79.8 KB Created: 2021-09-05 06:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9ed630e2d214e3776348d46be11206d9 SHA-1: 77077d42442d06bbf9d0d52ad72809e869cbd81c SHA-256: c75392ac732b2bbc4591ff6dc3c8513dd6d4442c4687abe1d564c838c4d22053
164 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The presence of 'urgency/deadline' language, though low-signal on its own, supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7206f3936---33300126496.pdf In PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/t9okfu7nkq444b3jmus21q0l5a/bomoloropo.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/d118111627b2c3f6cf3d8f4c7859e7fa/verupulofite.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/7f74bcbfd4d0d6650ea330b44544f572/17688771813.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/27699321793.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/jaforinofolafinuzowur.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b85c68461a8339878f8ae465c0c85225/4372863668.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/noviwapalagajobemixupam.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/guvolevutibexoziveju.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/lolewulefoxewebugipu.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/32911166508.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/kujirenomenabesori.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/42a6b92857d1214e68b52c67cb4b94ee/xenedinupopadafebow.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/50257855390.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5bbdf053d4e4073eaeda71f2703df76/wufolonezafiwipapudin.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/13299134716.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/sumelonesiluninon.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/2e0492409da24a92d2a5c5fdc3bc13cf/rafitefojemo.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/bibopokobududusojuboma.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/e21cb563e0ee2b7de733fd1d3c22cee5/papefepeno.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/dosivatupaxuvu.pdfIn PDF document text
    • http://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/18005275422.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8aebe65a9---79644651362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=aircraft+accident+investigation+reports+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_off0000d51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51B 10796 bytes
SHA-256: fe29c17c7defe4d4ca8007c4a3732d670b7ea875af7c607ec0cb65644ab4aa1e
font_01_sfnt_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 16896 bytes
SHA-256: 72ef6924e968063f99716105b6f017035a1835188621b0f1fdc161aa6b4ff7dd
font_02_sfnt_off00011972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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