Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96e4b43fcaf9a95…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 03:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e0af6db4d85b4ba7e5fbe5f67c03fec SHA-1: fddf65fb006b44f3f8daadcad0de0680ea8a013f SHA-256: d96e4b43fcaf9a95b226dcfac331d3fdaec776ccaca0becf49c418d27dbe8235
176 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS uploads, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or the delivery of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://garglob.ru/uplcv?utm_term=fast+and+furious+6+full PDF link annotation
    • http://slmj8.com/data/userfiles/files/78547196752.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/zefanuvewozuju.pdfIn PDF document text
    • http://8njl.com/userfiles/files/58296163623.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/nolojurezedonot.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/xilinilefiwibilibov.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///3033154737.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/kavinisamakasumawakojago.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pigudawen.pdfIn PDF document text
    • http://ausafe.net/images/art/files/71784055288.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/nurofujapatarupilovuveson.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/19107435532.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/81958280142.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/zavaxexorakovituxoranejam.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380bca1c239---jakidifa.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/wanaridijegok.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/fosuvefunofe.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-9-10/20210910104514308019.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16144b63376359---52123492988.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/l436c32sboneba40p5oso246to/63627256654.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/8842d9f6faf1f41622a2615278d48e49/jerela.pdfIn PDF document text
    • https://heureka-cz.eu/files/34840956957.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/77254581981.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/15057419981.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/36322917740.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/4287105117.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_off0000d0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 10460 bytes
SHA-256: 58c7a3acb1f5255de5e9874e321124d7b337d63aa25cdd0d15a32b0789742712
font_02_sfnt_off00010092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 17424 bytes
SHA-256: f1b6d3096b8743cfff8825c87dd5251542d1dd089f82b4b4604b3378fc1e0bd5

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