Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af4a5e5122be66a…

MALICIOUS

PDF

86.4 KB Created: 2021-07-05 17:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9d75475643efe82d4e8f801305020239 SHA-1: 42a840128534e8f592f2b7e8e44a1ac3e2881df2 SHA-256: 0af4a5e5122be66afa44b701bd2537da1b6645855e60dfe87aabf89a1b737dc0
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 high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of many external links strongly supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://huntic.ru/uplcv?utm_term=fabricated+steel+cost+per+ton PDF link annotation
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/p3885mue32unl25oiqv0dbu1lp/zulabovovo.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/90942590934.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/luguwozosovesi.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/modunajixotizusuzodoneto.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/7161b91e8bb9c1796d9a8bcb928bab4b/gewofovitalisovepixu.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/j3bfjabrtplqsnc7bdrs5glspv/bapemifegowexewamajop.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802e287e948---42591562456.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/59356180744.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45d0520385---77141940921.pdfIn PDF document text
    • https://ahha.az/userfiles/file/ripoma.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/zurun.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/5bf4b46bc2be00f8d2564a59a1356232/40917230640.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/ropejasalazomujunuji.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/86054573494.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/klbhrbjaicrm3dh6gd1sbi8mv9/kosexakazabo.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/7omltff0kpn3anvvmiftmeuahh/14458558264.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/2916276233.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8755809d---96768253610.pdfIn PDF document text
    • https://rendiamovisibiliglinvisibili.org/file/dagoko.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d94346592d---55172878495.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/40527102627.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/0c41556048b8bea21c1dbcadbfe40c13/59997849566.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_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 10624 bytes
SHA-256: 36d45e94a8b4a1fae555f693b7d8380178e91c14601909f2ccc0f18b4c75af4b
font_01_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7B 16984 bytes
SHA-256: dea46b95e00529563922ac37dae4b5c98a83a01d6172e12dd98dcdcf0e6effaf

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