Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3cde546e84a5ee7…

MALICIOUS

PDF

87.7 KB Created: 2021-09-03 00:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 61452ac97d869728c34e6ae67b61bbea SHA-1: 774304cb05c6d746ed8dae79b6d4e8b851ce0acb SHA-256: b3cde546e84a5ee7245f5bb726cd8284ad740aae78697dff1a4bb09193af2ec9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://cructi.ru/uplcv?utm_term=oxford+urdu+english+dictionary+pdf PDF link annotation
    • http://sumosushingrill.com/uploads/files/9075284979.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/i4bl1jkqe2qvi7cubi8hqbvcmh/gagafirajajibasof.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/18870105177.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e70edcb21---25152118316.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/62026585419.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d181df5df2c---tilozarafimevevelidifuvev.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/jupobitotax.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/bobum.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/78416773553.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cae39266e4f---garajidekokepotozuzewuwi.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f62b57fa9---31721060934.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/87764657979.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/muzawef.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c5327e46e---sosidumitaziguzinupe.pdfIn PDF document text
    • http://gurukripapublicschool.com/userfiles/file/jugubetujibebasuwozinas.pdfIn PDF document text
    • http://fittbikese.hu/files/file/75329241385.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/92261264327.pdfIn PDF document text
    • http://industrialdevices.in/uploads/49235483505.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56a22e5b4f---63450203318.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/94444671592.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tujekowawaverulaxos.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/d59a2d027c771cb3200d2696388111bb/42664174616.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5730dcbea4e32bf6a153bcf4bf46908c/toforabelewugogogu.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_off0000ee97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE97 11240 bytes
SHA-256: eb27d26891d71a9bdec578da54d05d19d4e4cdf2252a114d15cebfcf7b6dab84
font_01_sfnt_off000108ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 18568 bytes
SHA-256: 69aebc3283529e1cef4d8a69c0e68dae999e9a90051d22e2f2506f1b6b394afd
font_02_sfnt_off000138a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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