Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f75961b963c9935…

MALICIOUS

PDF

84.8 KB Created: 2021-08-11 23:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ec281f074cbf2383bb7c054c6a396982 SHA-1: 8e1e31f05ccc5aa916ca4a22bb356161977bd229 SHA-256: 2f75961b963c993582e408cdd976ff8eda4b3f08539e8bd9eed928d8b3b0d57e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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 https://garglob.ru/uplcv?utm_term=mooligai+ragasiyam+tamil+video+audio PDF link annotation
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4033f711f7---83177630589.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/d71ca75b349e771eabe05b3a21ac286c/kotaxuvixip.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086776e933a5---93655765157.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/06/file/85588387958.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c1bcef6046c9ee47ad1228c916176a59/puwefibitanuxapexexenilo.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/tetibotalejegapatuzon.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/memaf.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/sedeliwumodogun.pdfIn PDF document text
    • http://beiks.info/public/file/wowitesorubekoxajoni.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9d99dc1a---82349155095.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf8f4c1867---lirinaxegojegedonejokemo.pdfIn PDF document text
    • https://energooptima.hu/upload/File/lexavipepegutab.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/14492671715.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/gelufagefaledilokebetur.pdfIn PDF document text
    • https://advik.net/userfiles/file/4114588363.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/nodojajomojefusamugarewem.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a87fa4ac4b6---5408107027.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/vumifefolewigurupevutike.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/kinira.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb43098811---1412180122.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/fitifuworef.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc6d546cc9---dagigibowuvituturuliku.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/difinirezikupegelur.pdfIn PDF document text
    • https://abeess.com/userfiles/file/65683406672.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/24383637385.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d1e26e18d73afb0c10bb020bec82c795/lefatexemuwekasemasu.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/ad7b0f92c944d3316d5d15343931b3cd/36556112024.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_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 16840 bytes
SHA-256: 47da8351dcf934d90b2d362b198fc314ba181f1ef637bfac539154546319b60a
font_01_sfnt_off00011334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11334 10760 bytes
SHA-256: 28d0a78c3915219d3dfe40d3f19cb82bbe5fcaab3785f3d9f32f30fc8da96121
font_02_sfnt_off00012bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1