Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de516c2bd4984b4…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 22:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1197b8570e4380e88d28b9a226ce9e25 SHA-1: 5596a89ca0cc0a3da41894b88a57d7672d13b4ee SHA-256: 2de516c2bd4984b41bd208dee3c42051b77c06fa029ba487e8e84640be539ea2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide a clickable action. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to host malicious files or redirect users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://sevvalturizm.com/rsm/files/petamozeguzarodegopefi.pdf In PDF document text
    • https://leosservices.com/userfiles/file/kugudepewokapo.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1613af44f1c6f9---bomimovukoxoxedixaw.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/161324dd8559b2---jipokudajifi.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/fejujotiwaximifa.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/jivavujopuj.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/10873435971.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/maroxesigilulekar.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/wojibezuzuli.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/zetuxe.pdfIn PDF document text
    • http://indemo.pl/Image/files/matojonegamamanutoxawu.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/99739902166.pdfIn PDF document text
    • http://bandbaajabarat.com/ci/userfiles/files/ramazepizujuxaribul.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/48625629851.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/tebidizofudejigitadufob.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4160798df---78614226583.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/nuvafoxatoket.pdfIn PDF document text
    • https://ochronaskory.pl/pliki_user/File/90115457900.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/15011763593.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/rejagukawu.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/cc8afc39f077aeefd6f371e615d8111f/93318861747.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/ditokekana.pdfIn PDF document text
    • https://hinaweb.com/upload/file/delemofi.pdfIn PDF document text
    • http://trieuduong.com/images/Download/wasivegekukazovi.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/19299781136.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2aa91fbb888cfdf07fc8f3a097c90aa7/tisolabilekinepivuxufi.pdfIn PDF document text
    • http://asvpp.fr/pdf/33700105404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=best+sports+streamingPDF 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_off0000b7f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F1 10604 bytes
SHA-256: b54c5256d53fd3b9dd170b3f2e3068e5a52fff21e80a3d61d0c96cdb8d921ced
font_01_sfnt_off0000d032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD032 14176 bytes
SHA-256: 72dc8b03c4f3fb42757804b4e8cc6e371f6b72018050361c09e2cbd58e564790
font_02_sfnt_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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