Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ed741d200be33e…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 02:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 872d4a48f5c6813d19a9d7a544b2fa00 SHA-1: 4c72f95d35c4ba2999fc4c1fc90b514709fe9ab5 SHA-256: 69ed741d200be33e758b81179e3bbc9cb507a8a1bead52305dd7653efed9126b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised WordPress upload directories. The primary goal appears to be redirecting users to external sites, likely for malicious purposes such as credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://yarpaket.ru/userfiles/file/73136854221.pdf In PDF document text
    • http://longvu.vn/Images_upload/files/28769138503.pdfIn PDF document text
    • http://ty-int.com/files/files/66643834698.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/c43398d9eef5432651649bf741e8c008/fipibiwavazigis.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/4602555796.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141578df142d---50189855268.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/a0e17fea28f643542f8b0f2d1ab75c6f/kafifudikolupejunirifaw.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/72374422611.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/cd8474e0eb7e1eb6a2c7f9bc3867cc77/67577917970.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/wawemuj.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/21757308087.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/9287542419.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/7526428153.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135aac38ee1f---zesimixatajawe.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/17611692512.pdfIn PDF document text
    • http://babamoleskine.com/files/file/77332619705.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/kokijanomitotedo.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/64664f7f2cf6d28af90ba8da8e71d6c3/74648068056.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613650614f9e3---bazakedox.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/pikidosinowodebasikilivos.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c30ec665a54447f7ed6a8d4157a46c55/suvive.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/jokozaturasex.pdfIn PDF document text
    • http://termosystem.pl/userfiles/file/jugigabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=chemical+properties+of+ethanoic+acidPDF 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_off0000b04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB04B 15268 bytes
SHA-256: 332545c743239976c827386cbc814634b5d393c041fbfe08b1fc3ffd29d8c11a
font_01_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFC 10916 bytes
SHA-256: a3e382d3259ec242c958b59cd8fad728d88439caef140ee7c5e05c6bd3c45921

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