Malicious PDF — malware analysis report

Static analysis result for SHA-256 196294f83a4d4a31…

MALICIOUS

PDF

76.0 KB Created: 2021-09-13 09:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5136be00d0056c54e5c36f3573c92106 SHA-1: c4af65ab900b4e8901d835fe7d6db98fb0205717 SHA-256: 196294f83a4d4a31bc528b6ed8a06ed38d54290f0f095cd3da11b8d47faa42b5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://geoman.cz/data/file/28721086966.pdf In PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/tejajeviponojezo.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/8245601599.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/32919867235.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/40737685451.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109122324486890.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/solumeradedej.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/45945519893.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613171fb3ffe4---muzomawaxepelase.pdfIn PDF document text
    • https://toocapen.com/files/gozerabumuvakexomi.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/wolofiraxorujipazavadex.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/33686445535.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/21571232292.pdfIn PDF document text
    • http://elpijisystem.com/file/84785161775.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/3141903998.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/81531989146.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/01985cd25afd7a576a1c98d33d19fd7a/bibumisumewajewufuv.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/71240992219.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/tamulujafegixatizi.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/81552228883.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9882cc308---18204982729.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/90956125275.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/183882179.pdfIn PDF document text
    • https://mbbs.hr/files/juxapapajivitumuxadenadu.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/17889195371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=rephrasing+1+comparatives+and+superlatives+answersPDF 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 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_off0000c0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A2 11312 bytes
SHA-256: d5e48db301371aa6485fcb2866d7b2d44bf65526dcf19830fe7672ce9d976f30
font_01_sfnt_off0000daf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF6 17836 bytes
SHA-256: ae806d6214a9fa37fa305fe495e80a78f3423d1089e6426b44f44f73bb43539a
font_02_sfnt_off00010975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1