Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0d732dd8b5a172…

MALICIOUS

PDF

88.9 KB Created: 2021-09-08 12:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e5501a19384a7057f8503f802c2a591a SHA-1: a213042210c94af3aa45bb0d4ab580c8e80b1f0b SHA-256: 7e0d732dd8b5a1728164a26511faa4d9d2b1e3725a6f3ebed0865645b9c13833
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://djennebeads.com/nbloom/fckuploads/file/fabapixarolabumiwos.pdf In PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1610afd0b6f6f2---86861372721.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/25141488746.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bced936061b---pugir.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/vozalabe.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/jeniwad.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b57d11c56---kitexadepifofet.pdfIn PDF document text
    • https://volpatoebrum.com.br/_common/admin/scripts/ckfinder/userfiles/files/99933636850.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/5fb9fcb10c6662e3205cc910c12dfa87/61361349070.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/49464689986.pdfIn PDF document text
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1629742543.pdfIn PDF document text
    • http://maidichike.com/upload/files/nozobopimematam.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021082405302680554.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/79450293685.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/12779589852.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b03d8cbd0e---zelulofudigemotimudam.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/supuz.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/e27440bcc5ef09e7f89f25713c22e189/kelapugosomefubunazazeb.pdfIn PDF document text
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/nimamorunewofoneromipe.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xapiwofomamunowu.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/xawidetutenupigilekefiv.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/viruzufavibesupamigidasuv.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/d17454f3f146b20ce6dc9ee3ad861495/gilemuwadalunaru.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9d9739c1---liboxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=best+time+management+books+pdfPDF 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_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 18180 bytes
SHA-256: 783b9a57197119f545ba3ca1d191628122e9c3eb41efa449cf363b70d31462f7
font_01_sfnt_off0001246c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246C 10980 bytes
SHA-256: 9726b10842becc0c020de6c31ccf9b0e99d9698618cba6c7ef57bb8854b79286
font_02_sfnt_off00013d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1