Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae07dadfc267895c…

MALICIOUS

PDF

91.0 KB Created: 2021-08-04 05:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ad407b47474e01f7f8dc16ba0d8b1676 SHA-1: 7d7c34dd0733c3701262a8d74bdc46139e69ff1e SHA-256: ae07dadfc267895c4bd54cd1c470fda15b45d25266e8dec661dfe15e4dc48e9b
156 Risk Score

Malware Insights

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

This 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. The document contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious intent of executing code or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://baongochoa.com/upload/file/bosamutijigega.pdf In PDF document text
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/70364691710.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/vesolozirakolabo.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989942339a3---91810102808.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/e623d32a5438f2cc65b4289624f3dc25/88195416831.pdfIn PDF document text
    • https://bevelec.com/bevelec/dossierMois/file/78969021481.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/61eabe9c0d3967ae5ffa212fb3dc3318/9924914743.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/jekegobideziduwok.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/96ci0qvjclt7glnu0rkv3h3v87/toxapobu.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/667b33a92cca1188abd9d6cb3abbe741/65646518013.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/61310364230.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26848315567.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/18ad8170e71e3d234a51b8a7526a06fb/tatez.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aff41935bf2---miwizo.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160732f525be73---vupufiwir.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/99057004427.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/kkafst5p0k00037mhg5phjk195/98542365708.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b87125ae8---ronujarizok.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/8e926fb5aec9887293e3aa21877e5cd5/99213191796.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/lalazufefotorize.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/2095332225.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/85c3061fbca0cb04f660041508ae34ea/birazunozefaza.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/30104184161.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=warframe+nightwave+weekly+actsPDF 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_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 11016 bytes
SHA-256: 8b9210b418a118573f840307150d2720a8ea4a81fca6d9515778314f8c068343
font_01_sfnt_off000112b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 19088 bytes
SHA-256: 2cce1b505d8224728b8f1ac9f8422e9597bed94c10fec4c98abc3a176a7c2d32
font_02_sfnt_off00014541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14541 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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