Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a53ae0de0c69df…

MALICIOUS

PDF

78.1 KB Created: 2021-09-05 04:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e64304995daf7ed36c1ec79b9eea4e4 SHA-1: 7c56367e8d4af9790c8987f8f56222df8ab434ce SHA-256: c8a53ae0de0c69df818a284e0426ec2beb2c6cb6d122611924f9bb83226cea93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://irlanc.ru/uplcv?utm_term=scooby+doo+comic+books+free+download+pdf PDF link annotation
    • https://thietbivesinhanhhuy.com/asset/files/59605761732.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pogetotumev.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a88bf80bb85---38438634529.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3ce24d36e0bdf5e96014e498e273fb00/lusukemuturinenefabejes.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/97d84e04e0445ef931c1942a7102f7b3/domurebesazasajixipa.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/6c70d48eb19ff2acb3ace748842c007b/60750367007.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61c325460---46757921125.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/33594354275.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202108161446381363.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/neliterodeminulovo.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16083e99a71809---74650569989.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/wotixuvodawori.pdfIn PDF document text
    • http://chetaomaynganhnhua.com/uploads/files/vuvomekorubo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b675d85adf9---79051243914.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611302d686585---37566296501.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073ccbf416b5---13609559458.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/85118803292.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/zulatixilazomafitune.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/0j69h4d65leu4efnflgmgbq3m0/zebowenuwugexar.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/051658214299.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/rubikaj.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/pazawiretekilub.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/a27b3b4a3d50bc6e1e8abeedfe501045/50775085857.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/33483804364.pdfIn PDF document text
    • 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_off0000c57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57B 19916 bytes
SHA-256: 0ab974ff51b2fe7da3eae69657ab64fc9dd3b91b0b3b908601b718591c951ede
font_01_sfnt_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 11192 bytes
SHA-256: 00692ddfa5f87e0da22d790219d0d9a1fecef7c7c8b0764e12bd25b932514dd1
font_02_sfnt_off0001120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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