Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ceaef87e11c95f0…

MALICIOUS

PDF

80.5 KB Created: 2021-09-02 12:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b3c7a2d3d7c1111a74d6a1f0ef7cd825 SHA-1: 2d15aba029ec42f49f40b73e6f3eeb8cdd2c4d96 SHA-256: 6ceaef87e11c95f0d379c6e76b358e2a3fa34f0e2731d8f19d6bbe1c4e993310
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 installations and disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links. The file's structure as a link farm on compromised infrastructure supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/619b3c8b806ff1faa691398df30cda4b/73222607717.pdf In PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/genuba.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3f00b61ad---43154210880.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/rjfuj1jt0f9m78vhrqqf9ie954/dajazelupomofogodasazuf.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/3552959388.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/xinudub.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1056ea918---funadarirowe.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/76738658400.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091b06e78061---18926647442.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/d5180bf9360b4c6bede2692ca15325cb/56406274301.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/b523ec4d71faf7e733af8f84086f29bf/3329547508.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160818d100d9b3---21272964148.pdfIn PDF document text
    • http://homeopathyhk.com/files/risisubiz.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/29097307232.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/xosibuzaraxajolamubigal.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/13907305867.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/manopigukenogoramubuxuj.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b02f1504bb7---71080615208.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/11919392718.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aac96b9a4ca---revelonakejakawapil.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/bigoxagivedejefapatupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=save+pdf+pages+in+separate+filesPDF 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_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 10696 bytes
SHA-256: c0a0a7eaa7c326917210d47e32b31f008d750788f2dea6e39537f44969c02b3e
font_01_sfnt_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086F 17140 bytes
SHA-256: 4f82e5f5294564b75d6a315260dc77bc3fb2d1d3cec7ac08d405f34687fe9268

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