Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f2a3e611c8d6b7…

MALICIOUS

PDF

91.5 KB Created: 2021-09-01 05:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 30b01bd8caf509957d17fa160959539a SHA-1: 25d08ff4e4514b4f8bb74522afd3a8288cd9f77e SHA-256: e9f2a3e611c8d6b73337ccb706b9f139153f0c79028d6e87582c9b89fb967754
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host further malicious content or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are designed for SEO manipulation or to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609bef5739490---480593598.pdf In PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c84f7c0c618---62389083301.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/tevabudisigap.pdfIn PDF document text
    • http://macphersonproperties.com/clients/876251/File/rupadodugukamobonewekuzek.pdfIn PDF document text
    • http://www.emailposte.com/pictures/55010554470.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/79065259842.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160df55b057560---bupuderobixopelukasifipo.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/86060864418.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/67073789220.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/91239251866.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/relotazuzuxesedakafumi.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/43768487421.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/bikuwufijumezebal.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093ccb3696a2---befuvililapujazuvedade.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/buranudemufin.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/31486013773.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/9947183413.pdfIn PDF document text
    • http://farmina.ru/uploads/files/4360052786.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/wuxenujixu.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/v8mp23lr39vjaq9emv8jboflj7/83902193948.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///74506835194.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/d44f772a71982a614a3740a5e20d4c0f/99133094876.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607702ded655a---zalulisujegefo.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4200416d0---roravedufimanepojipigop.pdfIn PDF document text
    • http://mylodge-naoshima.com/tifisujuduxikata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=meaning+of+imperiumPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 1868 bytes
SHA-256: 9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51
font_02_sfnt_off0000f4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A2 10484 bytes
SHA-256: b6a58c51d5f7bed2010f70a7c54aa69bb2ffef09f05b411dc10c2e9ddb303fae
font_03_sfnt_off00010c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 16664 bytes
SHA-256: e2f7497a8bf68b6714285135fc61ffeb1b600dd13ab06b594547f04063dc01c5
font_04_sfnt_off000123e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E0 22484 bytes
SHA-256: 929521c6a90ea76452cc2b7b707e4c7bf60ff673bead6b1b49a7df8c8fa2c8df

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