Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7d256deb811709…

MALICIOUS

PDF

69.5 KB Created: 2021-09-20 20:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e623fe3a8cdeda4941fb408798fbe068 SHA-1: 219c503f322719d7fd58fb2ef3840de3b63abd9c SHA-256: ec7d256deb811709fb259ccf9bb9f4d5f73b69087c1f4744d67e780aa4560aff
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document exhibits critical heuristics for a 'Recovery secret / private key request' lure, indicating a phishing attempt to obtain sensitive credentials. Additionally, it uses a 'Remote-support tool lure', suggesting a pretext to gain access or control. The presence of numerous embedded URLs, many pointing to potentially compromised or disposable hosting, further supports a malicious intent to distribute phishing content or malware. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://pierrevillers.fr/mairie_files/file/33652516758.pdf In PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/61203312467.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161304cc2e0f12---pukiwexopiw.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/xuder.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/wuzelolebabivelevadifajem.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210913174917.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202108312235232567.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/71909665550.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/b8877a4877054200b554574aa103baac/vaviturozamilenifum.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/rafelupu.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/74089672005.pdfIn PDF document text
    • https://media-get.com/userfiles/files/28075672473.pdfIn PDF document text
    • https://bnovum.hu/downloads/kemolozododexoko.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/41949895813.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613f24a9a5270---91438954426.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/mujobojopagidani.pdfIn PDF document text
    • https://ezastupitelstvo.sk/editor_uploads/system/files/50371676760.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/mewib.pdfIn PDF document text
    • http://hamyarsanatco.com/ckfinder/userfiles/files/gugenesiwugetadexukerox.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16147dc98a445e---52201646597.pdfIn PDF document text
    • https://krafteco.ru/uploads/files/ditobutanomesotemawezaboz.pdfIn PDF document text
    • http://canadianrockies.info/files/file/97390125778.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16135c252b189a---82752469279.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/lekixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=android+nougat+osPDF 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_off0000b3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 10324 bytes
SHA-256: 996dff8277273c10a7ffa91586b907234ee6b9549e511f6205d1810fc6a4df2d
font_01_sfnt_off0000cb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1E 14788 bytes
SHA-256: 40c1de7c61181d65c367c6976d7c9d93d8e1906ad1bc79c694a02e6505b3e672
font_02_sfnt_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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