Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61e64cd0ab81985…

MALICIOUS

PDF

76.8 KB Created: 2021-11-10 13:33:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-15
MD5: 17738d295e7b00ad0605ac0dc9deb866 SHA-1: 5886f8543993a4adb969f17ee3c975eb159dd542 SHA-256: b61e64cd0ab819853f9a0d670dec128420c518a9f4b6c3cdb40666aa1e249fe0
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://infas.cz/images/wiswig/file/381873051.pdf In PDF document text
    • http://garantc.ru/userfiles/file/50201492030.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/jowezolazub.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/38785870722.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/nezexexudoligizowafoj.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/39825116509.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/30148575324.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/73570484060.pdfIn PDF document text
    • http://stilna-ya.com/_userfiles/file/10506398960.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/zisozepogoguvifu.pdfPDF link annotation
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/74fb096d87ed9701004bdcec6fdd4102/mabudebatuseguxolufevesu.pdfIn PDF document text
    • https://buka.ru/sadm_files/95125738460.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/44993223766.pdfIn PDF document text
    • http://ustunongel.com/image/files/kelamovukikitetonel.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161353e948f5e2---83519038781.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/797e4f0e2bb566f47082ba4bf543b678/96287591029.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614ade5d58148---36950897876.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/36963738602.pdfIn PDF document text
    • http://viettruss.com/upload/file/figoposofomipekulu.pdfIn PDF document text
    • https://nepalfinepashmina.com/userfiles/file/mojujizawolazotoverejuli.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161669c92c4237---2086391047.pdfIn PDF document text
    • https://kralpin.com/calisma2/files/uploads/rimoteme.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/1afa8a881799f28386a5d756e2a93400/wokovuxusitar.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/65745471406.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9bebc57cd---lewitedudibufakinowaku.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/morolipomifofixunof.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/32209716082.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/u-9XGpgKpwY/uplcv?utm_term=what+is+the+systematic+name+for+cl2o7PDF 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 extracted file (font_00_sfnt_off0000c423.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c423.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC423 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 10876 bytes
SHA-256: dc518672201266faaa040c46a188a3e1cd6da0e7336aeea245ebdda0cadef22e
font_02_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 18532 bytes
SHA-256: dab8898e870fbb9bf524acb0d0698273bef79290cf9f947bfca32255eb2f1b33