Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a466c0292543a3b…

MALICIOUS

PDF

82.3 KB Created: 2021-09-16 02:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3edeeb8d566c8d80ebeba8549f5f9578 SHA-1: 5ada77fa2965bd7b70636dcf83b533c4da5b52a2 SHA-256: 8a466c0292543a3b7e9f0851f194305aa390390bd7976ccdb68cddedf684c391
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, designed to redirect users to malicious content. The primary goal appears to be directing users to phishing or malware distribution sites.

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://inwebjor.ru/uplcv?utm_term=identificador+de+canciones+para+android+gratis PDF link annotation
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/wogowitoxaf.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/96570792204.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/maravisefed.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6430442ce9987d41390d4aefcb1a3b0c/wuxivoxivigijo.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/65833557022.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecaad534cf---45532242344.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/67375297073.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/77301838371.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/feluguxawufawazajum.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/26325066661.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/71967753933.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/vonenozuzapenefuba.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/djib31f7cd84jbo843igp9a4u7/wovufakebuna.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/kulezig.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/13509729105.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/17539482611.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/1469780497.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/loparaxu.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/54060734970.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/68748351815.pdfIn PDF document text
    • http://www.de.ruben.pl/ckfinder/userfiles/files/89347842003.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/89584266052.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/94562642427.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614201be77256---sixofosuwik.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/23466109817.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_off0000dab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB6 10700 bytes
SHA-256: b77627e638dfca765422eeabec98fd752a6fe0db34be731cac5e70d0573695b3
font_01_sfnt_off0000f32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32B 18680 bytes
SHA-256: a990cb5e105f1294ca7e9c061bb79634b717e369f3e3d94dd3439a3880b0d159
font_02_sfnt_off000122a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1