Malicious PDF — malware analysis report

Static analysis result for SHA-256 faea70b003d09144…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 20:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f70bb9bb8585a76eabcefe835866e14c SHA-1: d4b0926c933721182b35b77f9be90cf9570f198c SHA-256: faea70b003d0914401c3f1c2d8533f5cd9004b9a8ef888dbe1e843865de3f5b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, lacking clear user-facing content but containing embedded URI information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://lacecinella.com/writable/public/userfiles/file/81384510216.pdf In PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607483e1e7f8c---semomirorojojilukinupisot.pdfIn PDF document text
    • http://meskerjager.nl/media/files/52035282276.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608d68c8dc630---52900297862.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/668555f7ed4cb3bd667bdbdbc2de3a5e/20259922788.pdfIn PDF document text
    • http://short-story.ru/upload/file/bajogi.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608749f8b7e58---newojepamiwi.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/80095736301.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/kavutupepolimejov.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ad50fc31cb03e7b1299b8069973a8a9/68184628423.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/kiwezesikako.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/76781681212.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed6cb6365ea---bamogiluduworo.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/e02d34c800101d5d677ff79c03366585/49503643642.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160757387ad2d7---lubibofutigasemawiwisa.pdfIn PDF document text
    • https://pt2-turbo-j3t.com/contents//files/52744698434.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/296296dcb1de3cf2564069914d6c842d/deramama.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/fdma0bv9m83rdi9oggon4qka64/90476954291.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/93430154227.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82c8302b37---87803083163.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160905d010e16b---zazuz.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/42012903681.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/muradogeluxasavixawege.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/4809168012.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=kinked+demand+curve+pdfPDF 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_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 18148 bytes
SHA-256: da049b11c4522ff61790358d076295f6062c1157c7515ea95150829b3f75c3d8
font_02_sfnt_off000122af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AF 10600 bytes
SHA-256: 1c9b4e2b01a955663064fba281b2102ceb8a770a0d37a9ca638edf92dc728657

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