Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0ef7b5877fbce4…

MALICIOUS

PDF

82.7 KB Created: 2021-09-19 04:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 926d7f4cbafbc75be2c042ee194c2408 SHA-1: 3fa37987397698213fb038fd0cf79b48596c7d8f SHA-256: ed0ef7b5877fbce4f3e0d666a3f9223e45c67f08d1ab5caf2160f854a57d5950
196 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute further malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mxag.com/upload/browse/file/xesanakefazukonirizum.pdf In PDF document text
    • http://mai-colle.jp/userfiles/file/lenofida.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/jokapexadiromozuxasoniw.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/25914553716.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1632005782.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/vivoj.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/lazitalubosemugep.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16146667e6b42c---tawudumoxaviwu.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/bulalatovaze.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/11301330904.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/33920753461.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/18948759782.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/202199353114740.pdfIn PDF document text
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/36248615582.pdfIn PDF document text
    • http://ingfrimale.com/userfiles/files/mafumiledarobavib.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/e57cea81a59936ca1cfac57ed1aeea4b/54183759399.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614101fd96b37---80065469367.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/46904825473.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/34414358811.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/55715135205.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/84892410315.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/18197305571.pdfIn PDF document text
    • http://tfforming.ru/d/files/gipaguveb.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/455ba48ee0d9b1db778486769561a54c/toruxifubarufaxunerez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=office+365+smtp+and+imap+settingsPDF 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_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 11196 bytes
SHA-256: b5df699cae5e290a276d6568b0e52fb85fad11eb04596dab860bc71abb93f2cb
font_01_sfnt_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 17836 bytes
SHA-256: 2b67204fb5cdf90d4cf7dceef09cffe0669478c2f110c97c88ba53692a10c7dd
font_02_sfnt_off000124dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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