Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c06b03b304e373b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-07 06:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 60bc6e2b4481a242575ce86f402fa64c SHA-1: ba851efd10d3d4a810e33f176ba9417680bb3920 SHA-256: 1c06b03b304e373bb8d2c4399de22ddb94289a4da5e53d45f965a5d79bc94dad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code. It also features a link farm pointing to numerous external PDF files hosted on potentially compromised websites, suggesting a phishing or redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hanoihome.net/img_duhoc/files/jujeril.pdf In PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860f29689e8---22851923761.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/1g3oqe90eutihqdm4ipnhihe9i/19473041009.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/5935047959.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/tepalipazobajo.pdfIn PDF document text
    • http://flamefitnessstudio.com/cewit/images/file/61357825581.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/78164284750.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084720da1429---wejodur.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/3dbe9536ee18f5a6c1b6e29606c82c05/benujesevavofetax.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/94874084394.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/13205533335.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/fagulokogagakesixubewida.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/wakozede.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb53c6b53f---xezoledekodopizibasisi.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/vozejuvugiwefo.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/33073993074.pdfIn PDF document text
    • http://krishikhabar.net/assets/ckfinder/core/connector/php/uploads/files/mumar.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/zekaw.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/80967895836.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/c78d5hv7m0bkb1a5shd11b3l20/kagaxeluvobanexi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=schema+electrique+moteur+monophase+avec+condensateur+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_off0000d82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 11272 bytes
SHA-256: c25bf7517a631bdb1141497fd1966559f7f2ba9aaf7450d75f056bb251661f8a
font_02_sfnt_off00010a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 20504 bytes
SHA-256: d4f70c5a0864c6d4169a53951029e0cb9d9bd1b14832711d442e2dadca26d471

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