Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6fc49a3e93679d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-24 05:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4b26c9fc1032c8e041550e03733ebfac SHA-1: 884ff485ed1783258fd230e46a18f403cbfa0044 SHA-256: 2e6fc49a3e93679d46588b417488d17bc54ac69c46bd977af2649f526948f9a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised websites and disposable domains. While no scripts were explicitly extracted, the nature of the links suggests a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614d013fdc7e8---79843972776.pdf In PDF document text
    • http://www.ekoforte.com/upload/file/fegodawewimokuruxajepat.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/pegedabofedekemiviwofi.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/liwamisavemibibap.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/vokukonoripovikefi.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/mit58gfeqaguc7jim7c2qc5ej1/mozalefasofokunuzofokis.pdfIn PDF document text
    • https://dhrc.in/userfiles/file/12764399588.pdfIn PDF document text
    • http://www.siposferenc.hu/html/zupigimibu.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/8d140906042069133a7cf8135481dab3/lowatafa.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/20896146016.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/55a28fb8146b7cb38f95b7cb0cecc68b/87599191090.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/62991279198.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/mugaf.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/tajolugakofe.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/73281289486.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/66752389066.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/tupevoragojufefibejif.pdfIn PDF document text
    • http://letdentalab.com/img/files/44733893200.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae30a737ce---90342794501.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/vefejijeninidalovoron.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/xavedolo.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/nepokefesojipumikativaf.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/dedoxuw.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/bowutobetadikenevebamiw.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/betuto.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/tagetude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=circuitos+en+serie+paralelo+y+mixto+pdfPDF 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_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 18556 bytes
SHA-256: da1e46dffd091565e69650826eadb18cd6a75714d37039301c643154564f2183
font_02_sfnt_off00012a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7F 11128 bytes
SHA-256: 7aa1be5726c79e7604f819dac72fde6a63d1caae446983d1ba3a13ed750656b0

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