Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf469a9bed45137…

MALICIOUS

PDF

70.7 KB Created: 2021-09-30 21:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0d8f0009a78c4b089e4886fdebb95b9d SHA-1: c5e00a0673eb65157178be4e9bf96334176e5447 SHA-256: 9cf469a9bed45137bdebaffad88605bf8a20d78a5f32cfc39143cad4b5323406
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to numerous external URLs, with several hosted on compromised WordPress sites, suggesting a phishing or redirection scheme. The presence of external URI heuristics and the compromised CMS upload link farm heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614308eff16f1---80461644500.pdf In PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/roredajozidivapuguxemote.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/27548203682.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/fumiwewugivivukorivux.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/dexovawetazupejegawina.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a1f44b11a---woxotebabiverekukevajeju.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/8551405717.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/rosud.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/kimafarivojubutofubafiw.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144a20ce3051---62544338778.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/39707877547.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/v040qvd85a3clbe0jg4in7h9k5/79441847233.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad0a53cce4---tewexobozop.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dc18a767ab0f52db639bc5cd2a1044e1/79396472596.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153ed5a318cf---88109270671.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/femawidebedizudoloxus.pdfIn PDF document text
    • http://master-vin.ru/files/file/680113187.pdfIn PDF document text
    • http://hbaoge.com/upload/files/mereliza.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/f6ji2e6rgtjpkn4of498v89dgg/mavag.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/11858263499.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/zamowalininusogokat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=view+instagram+profile+photoPDF 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_off0000b254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB254 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA66 16488 bytes
SHA-256: b08216d8355e17ea857ca67879bead7654a24ab5437a691594bbdd1b06e2c108
font_02_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 10860 bytes
SHA-256: a020a0c7d3dd697019e8a54afdc0ddec3d8da283c04d140333c06be1761533f9

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