Malicious PDF — malware analysis report

Static analysis result for SHA-256 366ebd190dc4bfee…

MALICIOUS

PDF

79.5 KB Created: 2021-09-19 01:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ba0437329b02026def95457738fd5e6a SHA-1: e8b93422a3774f10e7cf04f0ebe9e2467273fda2 SHA-256: 366ebd190dc4bfee75c49b707f72a8a8d557fb579f057e186ffe1c9fc2ab008f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many pointing to domains flagged as potentially compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing sites or download further malicious content. The PDF structure itself, with its link farm, suggests a deceptive purpose rather than legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://jagamimpi.net/contents/files/22965045121.pdf In PDF document text
    • http://gyuco.com/uploadfile/files/20210914_075655.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/relewaritol.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/97559468555.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/36149215717.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/ruwotabuzasemejugafo.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/93523991309.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/78937426938.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/fibabexugogebi.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631390213.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210902185501_412851214.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161466127cd818---77073865015.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/75223223685.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/gezirirabaj.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/25021485331.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/s89r1tq12383pisfrf9bmu9akh/38791968756.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/7051798965.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/16984161106.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/wuvosumezoxakakoxala.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/ruzegosumakegum.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/53652207148.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/b0200afe94d8ce510a7cf327a9bc8912/gaxibugariwaxix.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/161352771918e5---2045637133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=2+sim+card+iphone+11+pro+maxPDF 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_off0000d242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD242 10812 bytes
SHA-256: da20a2454bb787240518acff9af5d195edd81c4438c0b419ccad61fc8c50d6b3
font_01_sfnt_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 17656 bytes
SHA-256: ec4bd828e95af47b7f0d88747d3d221ce3be1f87cc461c68c755baa2bfc35d42
font_02_sfnt_off000118d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1