Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c8badad491288e…

MALICIOUS

PDF

87.5 KB Created: 2021-07-19 14:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 74e2e8ab3e181dc23d51f2e626f043f4 SHA-1: 27c46041161c4f94e1bfc2a29a5e476e2adc1078 SHA-256: f6c8badad491288eafde3a0692f06243ba12d5d076d4ca9fc9d6207e5abcd242
204 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. It contains numerous links to PDFs hosted on compromised or disposable domains, suggesting a link farm designed to distribute malware. The presence of a 'download button' lure and a 'password-protected archive' hint further supports a social engineering attack aimed at tricking users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://sportsht.com/userfiles/file/57323171128.pdf In PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/besuvedewejepokinulixited.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/upmn2irg03t1i62kjlnhsskl4d/40227827209.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210615024303.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/3129cdb30a701f2b3567d5cfddfc3344/40179618474.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/46265211843.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/1006140164.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/mituwalixopukoro.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/vevowiva.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/53594325427.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782a5422159---32111759613.pdfIn PDF document text
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/83839984663.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c24d6dce54---31056192143.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1292470a11---40592161067.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ffebc1c13---60942052970.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/40099875806.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace4fc42a28---ronajekima.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/jurozojosukiranixolesik.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ffe8e0d32---gegenivukabifatatulaverog.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/18661952658.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/73239343560.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608a42fdd193e---nobavofisulonupawututa.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3311486ca1---83126292622.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/16811891446.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070850f0b530---datikodifodemawoditive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=subnautica+game+download+apk+for+pcPDF 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_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 11288 bytes
SHA-256: 47eca78816325628d8455893bd01ad4364c0f6eb6b335973cfe62ff5f443dfbe
font_01_sfnt_off00010b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B85 17216 bytes
SHA-256: 12c0a941e799b8be92d1e7098c38a3d615be03d968c8ef31fd97f2f32504cbd9
font_02_sfnt_off000138b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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