Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e1d10686bca607…

MALICIOUS

PDF

81.2 KB Created: 2021-09-01 21:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 23f0287529511288da981996f62c8c1d SHA-1: 57481d0510b6ac9b81d10b60d65717937f1610d3 SHA-256: 89e1d10686bca607d0b22b9ca137277db32a8f3dbbc8751e4004cb2e5883d3ff
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV heuristic strongly indicate this PDF is malicious. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The 'SE_URGENCY_LURE' heuristic indicates the document likely uses a pretext of urgency to prompt user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://nordicwalkingturak.hu/_user/file/gitomawuti.pdf In PDF document text
    • http://auburn-companies.com/userfiles/files/zovanixoxat.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/d00f29e2b2ce42fd35ddc0d1ed2a38d9/fexuxi.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/rodabakil.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/m8suc4j8u0nel8b429sn62pikn/16538782254.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/8ce459fd675c0f187f3c4656783c4a02/1584753036.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/jawulusu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/efc200tc8grmb7qb9ejmrucub3/62399188126.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/karatidarozato.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/vemugapawadox.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9749f21ce7---mezuputegigiwopurebug.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/nilipafopemovuzupegitop.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/27845455016.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/8a51c0ae764e78264d02dbb1efee9e50/bagodanidoxofutuxa.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ohsk43dgaca1q5fvuqf83qmf42/matilagiz.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/16901345144.pdfIn PDF document text
    • http://bethtikvahevents.ca/clients/2/20/20a91c0cb94b02964b0d1c5d980f1596/File/bodosotomiposulojereb.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8a4f4d5e8a---75742036822.pdfIn PDF document text
    • http://stfurnimart.com/file_media/file_image/file/kesofo.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/32501946888.pdfIn PDF document text
    • http://midlandhigh79.com/clients/866549/File/27529818777.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/wosewikaf.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/jufojojawirevifubadipem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=answer+to+the+question+noPDF 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_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 17836 bytes
SHA-256: c07214b76ef4bbb0bb43f9a599e695cfc8f8b811032c67c3fd666e87c0c7b698
font_01_sfnt_off0001077c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F93 10312 bytes
SHA-256: a5304dfa7ffd8f87cfaa4397c878cac9d2e650aea0910403861af6d1489ab1c9

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