Malicious PDF — malware analysis report

Static analysis result for SHA-256 5521db08c11568c0…

MALICIOUS

PDF

77.5 KB Created: 2021-11-10 11:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-19
MD5: dc05a61013d0ae5ca9ee98664fdbb307 SHA-1: f3d16c8bb85d62d368d85267e0575096353de916 SHA-256: 5521db08c11568c0de2d8ec6f18af79abc6a590ce41241338b937b894c5b44c3
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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://irlanc.ru/uplcv?utm_term=apkhub+call+of+duty PDF link annotation
    • http://zoo-foto.cz/userfiles/file/32267030199.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/98b794b2b75d74ece633fec45a146a93/fivekovozofofoxobud.pdfIn PDF document text
    • http://gongin.humenia.com/upload/userfiles/2021/10/files/211017002156.pdfIn PDF document text
    • http://runwellconsulting.com/file/file/24257548057.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/54f80a9644bd71af5bef0a19d6bb5964/voxudigiwadekabasatosuz.pdfIn PDF document text
    • https://godahoian.com/app/webroot/upload/files/47196953499.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/70088626756.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/ramulaguduxebamajufita.pdfIn PDF document text
    • http://vitrine-prof.com/files/83928904667.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/16969101627.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161749506c2aa8---17101076249.pdfIn PDF document text
    • https://gopherscopes.com/userfiles/file/24586036844.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20211017_220332_3410.pdfIn PDF document text
    • http://sb555.com/photo/file/vinasirazebamonib.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/3833115721.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/270670235.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/36855345494.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138db5572fee---99266846685.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/wixegepi.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/28009668278.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1616f33e5dbd0d---madebigiduvamikunoneriz.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/famafalenemenusereduv.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/27191377592.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/lorexilewutituvovufobab.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/5268845103.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 extracted file (font_00_sfnt_off0000ca4d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ca4d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4D 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off0000e173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 10548 bytes
SHA-256: ee2fbb3a4348d4d73166e0232a75c8c493862f389a8bedb42bf4bbdece3b1258
font_02_sfnt_off0000f97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97B 17852 bytes
SHA-256: 1ac55a459ca43fd47a69fc91c2b25fe7a4c31cea846a9acad12e675b3ab1f1bc