Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdd76ef05ff93ed…

MALICIOUS

PDF

73.1 KB Created: 2021-09-01 08:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e75dcce4207dd9aa43855d10382125f5 SHA-1: 05651e91978e010f8c6a55ba8d1a896cfd8a3300 SHA-256: ebdd76ef05ff93edc5edee899a0bbc47845cd2574349517aabe4d2720f5c61d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm characteristics strongly suggests an attack pattern focused on driving traffic to attacker-controlled sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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://bclgrouptt.com/userfiles/file/fimaw.pdf In PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/porobazadifa.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/kowulofebagomamel.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/13832341154d84ff1b7f1f56ac19b0a7/sufibejuvamojawow.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/be2b3f908ec77c0ea6cd86da54d17282/93815548291.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/e6953aa8849fda80b5e9df26eafcb7c0/wisajisijuxufigutilu.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/5e681105f1640f2b9894f90cc623c494/77464393162.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/73725116161.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b28cd0e88---vigijilonawulinoperunebej.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/26h7ttjpvfhdf6s496jvf2khak/48820577416.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ec7ae37845f467804459ea2440145b80/powaribidopor.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/70063918926.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddebef55795---96219825426.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d3ce194efd---munab.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/81872148468.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f6c68f14dd620430241c6976c5d37ea/zuremefefavefijewejapasi.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/49943084928.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/81bbfde83b92edd4fe308eb4b4bdf6b3/wupanelo.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/diduluzilupezibel.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e4c79fdd0---timitewanugubarukufudami.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8f34b4722d7511c13ea484113f32c336/42226105940.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/jobidid.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc5e850e3---90115617988.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/wobonaguv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=percy+jackson+and+the+olympians+movie+onlinePDF 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_off0000ba27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD239 16432 bytes
SHA-256: 9abda6351bf64defb46dfab62796a0e75ad70d5638fb65e3fd9396e568e02157
font_02_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 11180 bytes
SHA-256: 88151925dbe0e2350c2c0c2609e727875549aaf34b3cdc3af6409c91570fef39

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