Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d48121bbeab39d9…

MALICIOUS

PDF

89.2 KB Created: 2021-09-07 20:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 755e35d77321627217ca0d760174c82e SHA-1: 77a5f306d5017be1d8751fe832308d20c93d4008 SHA-256: 9d48121bbeab39d91aa04a3580f2e3f7dd216a04855d65da9bea634334ab0db5
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, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to potentially compromised WordPress upload storage and other disposable hosting sites. While no scripts were directly extracted, the PDF structure and link farm behavior suggest an attempt to trick users into downloading further malicious content, likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100ec52589fa---foxewaxetevoge.pdf In PDF document text
    • http://abwrichmond.com/uploads/files/54709520122.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/f540gvshm5o175av3b1t7idif1/69470102891.pdfIn PDF document text
    • http://ozdermusavirlik.net/userfiles/file/roxak.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071ea2ab32b4---52842003498.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/t43v1d0u0ajepte6jjj3pa2nbn/58837513952.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/paxofadugisubutelidobej.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/wodugede.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/be21a037846507a7459dca875aeb44d5/nabejor.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/90725872784.pdfIn PDF document text
    • http://ropesadventure.com/d/files/40340012310.pdfIn PDF document text
    • http://gerocuki.hu/user/file/buvobajobowazerikeges.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/c9dc560a6989907469725653009b5d11/ruxironiked.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/43770299230.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210702_113559.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/judowuze.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd535888db---48274856848.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/kisumewunotovomise.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/4310710318.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/1455254874.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160899a25ed65a---gonunamozowibopidadap.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/7bb8119e7fef780ceffba9778c63f3b3/goruditasirux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=b1+listening+test+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_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 19592 bytes
SHA-256: 7f3f393bcc999230e8e26d157a582b6eca06c41841840259110c5a10b56ce4bf
font_01_sfnt_off000127d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D8 10396 bytes
SHA-256: 2130892f01494cc0323a193e202b1543e89be60cb5fd72c90a01f48dd096d68b
font_02_sfnt_off00013f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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