Malicious PDF — malware analysis report

Static analysis result for SHA-256 980c521d25b8203b…

MALICIOUS

PDF

82.3 KB Created: 2021-09-21 10:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 92283e630a5627f79862714ab03a7607 SHA-1: 6af61fbc7601a4a9a73963990e388a48abeb90fd SHA-256: 980c521d25b8203bce43eb2bfa2a025e97fc310f929fcdb9ad6582c67ebed124
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely 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 0.9955

Heuristics 6

  • 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.
  • 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://laborke.ru/uplcv?utm_term=gta+v+kings+money+glitch PDF link annotation
    • http://moestuinwebshop.nl/userfiles/file/runajes.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/tawanozinako.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/kefuwiwovenakorebinewus.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145535b59c98---66604463654.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/170733345890.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/xetelajofabewumobijiw.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/javakezipoji.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bb89e8e54---7219052954.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/22106689390.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/wodololokivuvironafoviza.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/sisukelulefebisone.pdfIn PDF document text
    • https://tele-video.ru/upload/files/gapuzadodanelizew.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/56150061105.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/7138cc546324efe63a15158d569019a5/69378262770.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/walazugizeti.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/tenebigalatiwege.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/15582580253.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137d428f00a9---fimumuzafivadagukemu.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/649981d5ed2a4e132e3cca8d130378dc/66485486534.pdfIn PDF document text
    • http://riasztoszolnok.hu/admin/fck_upload/file/wokiwoligax.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe283f402d---55412441874.pdfIn PDF document text
    • https://papiratisk.cz/soubory/91190100078.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140354329d2f---tajosipirobesuvopisotefo.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/75184388182.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_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 10888 bytes
SHA-256: ad90404e27c0eedc7d79efd48256c67c1629eddd1e1f559cb328c1ad61367d16
font_02_sfnt_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 20276 bytes
SHA-256: 00fa7615e540ef17cd514b41c395061d134128ebcdfd075a171307a8abb181eb

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