Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53a298d51a454a2…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 12:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0204ecd1f7c4d6bca90edc4f0ed1b9dd SHA-1: 8900304971e0653df01a066856633216573091dc SHA-256: f53a298d51a454a2444e35091cec8bd4bfbe3e9cb9994b7849e37ba779cecdda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://smidgel.ru/uplcv?utm_term=emotional+obsessive+compulsive+disorder PDF link annotation
    • http://hasyo.net/files/file/nefokaruza.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/55465203074.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/73793855075.pdfIn PDF document text
    • http://vinmexindia.com/uploads/43673608968.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/c434a0f91aa72b6066c2a0c4d5f34307/bevepog.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/3e6efce3889f32aac2ff56040642e157/34668184554.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/xonujivif.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/gomovelonujo.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/79953355867.pdfIn PDF document text
    • https://gilbertems.com/videos/file/wafagedemizurepugaru.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16106c2eba7a40---6737508548.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/5ea72c5b77b3f3492af4f852f9a2adfa/14313936400.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/98444585650.pdfIn PDF document text
    • https://anakaygame.com/calisma2/files/uploads/sopimabisujo.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/waxadabamivuro.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-9/20210709054638893075.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/q9vi2l4lnbdigjrc3iq5oea4qh/nipumivasotinegizupadi.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/67519149116.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608173001a7f1---13443833857.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/96253713308.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/noduxiwe.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee9c3c3b46---worusuxo.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b18b28b6f---rapuvi.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/fuzanoxonilaxe.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/22146249370.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/491362006.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_off0000e13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13B 17532 bytes
SHA-256: ea0c0c3f1da3b42aba8a7c9e0da0191bb782121569468ebfd8b993cc45730fed
font_01_sfnt_off00010d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001257d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257D 10964 bytes
SHA-256: a0e1821f751f8e274eccade992dfc7f24663dba4b798a5f182449e68ea05b20d

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