Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3fd077aac7a179e…

MALICIOUS

PDF

80.2 KB Created: 2021-08-26 12:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a6218fac50c107b5c4b487abb9213ea6 SHA-1: 10c8a2f4d9be7c112bd74873302404e2e2a4fee0 SHA-256: e3fd077aac7a179e65e852e51d0cc75c4c577c7b0607baef0625e971e237b650
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing the formcraft plugin for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests an attempt to lure users to potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1a4b60733---98467293777.pdf In PDF document text
    • http://allamericannursing.com/userfiles/file/23487464874.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210802_D0C196A1403AA96A.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd890dbd82---belawifusixawomison.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/ca4cf668620089d7ed6bb5d75049a3e6/kimakoreforuxelakusokasef.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/xusamegirupu.pdfIn PDF document text
    • http://gyobel.itpublic/file/wixadi.pdfIn PDF document text
    • https://advik.net/userfiles/file/runiganov.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/karazuwuf.pdfIn PDF document text
    • http://christopherdallo.com/file/xomirojedaxolurobi.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/domubobepuxefifiriko.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/376e0ff97f07e97204af0d90727d788a/89060573669.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/suvukuf.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d3b4a0c57---dabevolewowe.pdfIn PDF document text
    • http://velomagazin.hu/UserFiles/file/muzeseget.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/83391106745.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/nenolekomeju.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/ruwavipi.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/85058507822.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c513d15ab5---kulifita.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/kl84eh22mtlfkbig15bn046b21/26639667137.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/zijinub.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/diwelufor.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/54cf6e7a7c1cc6dc6a94f20ac082f1fd/zetiwoxivu.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7c8fb2a355839573563e232dafe3b26f/47096175543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=hastings+to+taupoPDF 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_off0000d81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81F 17000 bytes
SHA-256: cf6f74c51c4aa9d361b1fb9df0e391889e176a1686aa50a71fe3c694769e11e6
font_01_sfnt_off0001046a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 10240 bytes
SHA-256: 9e5892e275ba34fb71b3a55866261b3b22fab13896d6200b5cf2741a128f13ce
font_02_sfnt_off00011b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.