Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04e9d9d49814a68…

MALICIOUS

PDF

82.4 KB Created: 2021-06-29 11:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 564e4b92cded63789344b987a11798ea SHA-1: d4e3f33897a0b66249f4ba74fe8dec9c8068b618 SHA-256: e04e9d9d49814a6893f404029351859ebefa8805923b4dc8ba7c44b02f1ded44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://inspiredindianfoundation.org/uploads/dewuluvasigupodutubes.pdf In PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c6f4d13add948b5039be445ebf883ea9/sapojak.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d005444a1a---norinelamozu.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/toganawenori.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160809e60e92eb---wojujikoluxopivor.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/kosanisowe.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/zureru.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/99746012643.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/gulimagaxuta.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7ff296b0b---belutulowoxunetizan.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fe08d0ec6---bodiputujeje.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/7d66006aa54450ba45e2d9210aa0c5f9/45934312694.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d0d0446e099d753b8ed330afeac4cb47/firige.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23972718d7---93128143792.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abfac4af6c5---kowebo.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/7540790624.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/118cd777b695300343ffbf1458862533/wixonuzulunarokuwigado.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/sirukuxizamenorolex.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/13dj0qt5acsjb7sbqua2un6k16/dewabigozawipor.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/33940732161.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/fapobogirujadivo.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a64dc1d2590---92980577836.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/64463629462.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/liladagewik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=punctuation+worksheets+for+grade+3+with+answersPDF 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_off0000dccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCC 11160 bytes
SHA-256: 146a373ae28683826627ecd66bf5f3cfcab7857290ad8dc270cf38aace8385fa
font_01_sfnt_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 17308 bytes
SHA-256: 7d901ca95a63a29960abaea825cdbe1bcd05908ef0f3a74382eba4ed4cedf0d6
font_02_sfnt_off000123dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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