Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d901240c31c6b7f…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 15:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9838dceeba2876ddb58c215744795558 SHA-1: 4d73a44bfb9227011e098c7f13870af3226341b4 SHA-256: 0d901240c31c6b7f3b54dd08998416c7be3604d39debd2f22ad5372b14289716
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure suggests a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a248793f9---tizizosote.pdf In PDF document text
    • https://serviceelectric.ca/userfiles/file/97997458980.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/zefakasixilupa.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/nujubefelaga.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/nisaxusuwixojebufabakotow.pdfIn PDF document text
    • http://gpkoaee.ru/ckfinder/userfiles/files/sogawesowenukirufiduti.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161444ab946cbe---bevujusedoxufivikasodano.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/95633891156.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/fuxanapazozixegozunuzife.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/vivefutiforusuferoku.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7dbc39f12---25815461984.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/79010831538.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/fupanutasenukov.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16132e60db97be---50524145946.pdfIn PDF document text
    • http://ccshecea.org/upload/files/95723697170.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/bobadusojorewozow.pdfIn PDF document text
    • http://tnslib.su/userfiles/files/vozipigisoziwaweves.pdfIn PDF document text
    • https://onderhoudnlgarantie.nl/upload/file/89681039744.pdfIn PDF document text
    • https://profm.hu/files/file/46138266387.pdfIn PDF document text
    • http://logicamail.it/draft/media/37772181607.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/xevafikeledezal.pdfIn PDF document text
    • http://synowka.pl/galeria/file/9712814972.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/giwupakajoteluberofeva.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/jalevudures.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/38668417230.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/foduzowanunopijiforozeb.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/wekinajotur.pdfIn PDF document text
    • http://shoxet.com/18P01AIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=happy+bhag+jayegi+full+movie+download+720p+blurayPDF 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_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 17904 bytes
SHA-256: a8fcd4a89412ce4fd107b60d6abdd3f65b76a37240dc6f339e4af160d3c99952
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CD 11596 bytes
SHA-256: 129da5b509308e02799da4fb9bd5342b2d9a751b9fdec768ee7c6829fe0d3804