Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc047567af2b8a3…

MALICIOUS

PDF

110.6 KB Created: 2021-08-03 02:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58655ef0420d384f193f50591794b096 SHA-1: c9cd5fea0be0c11178a1e7bc9424b23f6177b5f4 SHA-256: 9dc047567af2b8a3d3b2caae9951857e2f40057280a1e695509ed4eab1bd3bd5
96 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to various websites, including those hosted on compromised CMS platforms and disposable domains. The ML classifier strongly indicates malicious intent, likely to redirect users to potentially harmful content or phishing sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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://queure.ru/uplcv?utm_term=how+to+make+mini+lego+fortnite+weapons PDF link annotation
    • http://chalappuram.com/userfiles/file/vudamuzobabomisufefi.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb56cef300---soveforid.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/vogivor.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/nafibe.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/40624134805.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/jaxigejufenofotowenem.pdfIn PDF document text
    • http://sun-eko.eu/files/file/lokowe.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5fa9c0de0721aaa56ec248385a1dfa0c/pufonam.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/94368015548.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210802232748.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/9p0m4696vc4dlic8h297va7t7k/redufutivapamima.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210726172547.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160f4d146c25a7---vobinebebunusugalajalu.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/75419376130.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/63047380697.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddf3c46216---56724595704.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/47f76b32e30c3ed12509556178327161/fodifokukumobutig.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887e52d063a---kenevibaboxetexumabipig.pdfIn PDF document text
    • http://apcmagon.com/userfiles/80566105332.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/8842f13d488927160875e73003364176/51988801321.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/mazamebupujologofoxajoxer.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/36387643129.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2635c82fcc---65692278130.pdfIn PDF document text
    • http://popmetre.com/news/files/4978089823.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_off00014b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3E 17784 bytes
SHA-256: 1c6ec69fe9d84272a931906df9626c028e05340798117200e2a8d530a1a8b759
font_01_sfnt_off00017a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A63 10872 bytes
SHA-256: 7614016628ae4801b96faa8c84702d3249c49dae245510e873bcc6ffc829f457
font_02_sfnt_off00019379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19379 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1