Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee73415a4b2120a3…

MALICIOUS

PDF

71.6 KB Created: 2021-09-30 15:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 107451b7129cbf82cb5ca7ea6b5b2599 SHA-1: 78e6f6ea50d18621033a36749f3ad7f06850e54a SHA-256: ee73415a4b2120a3d49703c7f267a083ffe3028b3641ff115104283f6e97c41c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms hosted on compromised CMS uploads and disposable domains, strongly indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The embedded URLs suggest the document is designed to redirect users to download potentially harmful content, likely related to software lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://garglob.ru/uplcv?utm_term=euro+truck+simulator+3+download+for+android PDF link annotation
    • https://euroroma-bg.org/files/file/35210144846.pdfIn PDF document text
    • http://ipceurope.com/assets/file/12486257878.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144cb15e729d---jobexonex.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/50871729276.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e25ba47319---62747925880.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/42118149055.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/diluwagipowofuvamufovi.pdfIn PDF document text
    • http://popmetre.com/news/files/51005001430.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/birexorononaridisabejup.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16130fa798c300---nivukul.pdfIn PDF document text
    • http://miminku2.com/contents/files/diromojaxasanofog.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/6362431887.pdfIn PDF document text
    • https://turkeyinsurance.info/images/file/papamosorewojirajamunize.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614d4f3601f11---vesaforagexumogutosifev.pdfIn PDF document text
    • http://profiklub.sanswiss.cz/files/file/tugulepizex.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/66704133553.pdfIn PDF document text
    • https://lederstuhl-shop.de/ckfinder/userfiles/files/17603783449.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/talujurenowo.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/79816777929.pdfIn PDF document text
    • http://vaynhe.com/upload/files/jodukibijot.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/rixemamivadeporoliwuw.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e76e2e075---98587465458.pdfIn PDF document text
    • http://th-hl.com///upload/files/fizisazizupubakodisiso.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/46536175720.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/10899247635.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/45989113993.pdfIn PDF document text
    • 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_off0000b39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39B 16680 bytes
SHA-256: e2fe4f116c3cf82a1ab229aa6f697d31a0261e855d92842b758ca57fb3fe7f24
font_01_sfnt_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 10936 bytes
SHA-256: f91f7d43350e343e1373ff77f1791069adb6bacbd7d92d99aed38ac6d34e42cb

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