Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d00a6bf9609314…

MALICIOUS

PDF

88.8 KB Created: 2021-07-14 04:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6dd5ba9ef7affdbab94f1d37b46a74b3 SHA-1: ec05858c5b8d3898b5a09b6569e003196df20349 SHA-256: d9d00a6bf96093149677249c9fd42c3e20c7bdd4df6ea5ab312f7cb04cdd439b
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains embedded JavaScript, which is likely used to download and execute a secondary payload from one of the numerous external URLs. The document's structure and the presence of multiple links to compromised CMS uploads suggest a phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=difference+of+means+z+test PDF link annotation
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4611db51---26924501110.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16071e09a3dbd3---97927240023.pdfIn PDF document text
    • https://ecoretras.com/file/8614365369.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/53265740345.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/99d5ab293994865f5d7bb4f5cc8eb0b3/86791307232.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d9f4df5067cf9df07bbbb43c34a20b1e/nujezowa.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/sebupodikimefimamuka.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160901bcd3136f---89265683855.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48c5256307---87609455712.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/nimapobikuzebabavetikej.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/tcm9efuc6bk9pe0cb66i662cto/85284936495.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/bakumap.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/jememule.pdfIn PDF document text
    • http://kodcomputers.ro/2664/uploads/zubilikesonomarokixewavit.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb65406f26---68643341964.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/zemirokulokipakilisad.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/93558292344.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/387cd3396bb0a55beb82fa09ebaf9b5a/38826269937.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ea4b55793---gigisuvekulutolu.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rpqm0e0f77hhf9t9anmfagrpa4/99000223542.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/94297177086.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e67495e7ba3---31924495595.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/2mt0ga4430agigsg1tir0ecoh5/rozukogonafiwoti.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_off0000fa5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5E 10512 bytes
SHA-256: af1b7b144cd35f3c41c8630af8e43a7f85faf32049e7026fb65cc1ed0d1b24cb
font_01_sfnt_off0001125c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6E 16688 bytes
SHA-256: 37848899d75f0bc8dfe50ba515821f817e9505ed2604ad4d3fec60bd0a2a0e98