Malicious PDF — malware analysis report

Static analysis result for SHA-256 675b6106602e8b23…

MALICIOUS

PDF

97.5 KB Created: 2021-07-08 09:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e19ae56432e370f16f1c9a0557564d65 SHA-1: 3235028fc58a5e35e2a8eb74022f0a1dfb6c3f0b SHA-256: 675b6106602e8b233fd7d1a26179cbd27a378a2a62ff8b353977bd815954e716
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final destination or distribute payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/07aedd921480de4acc5aed28b07cfb2b/15474482388.pdf In PDF document text
    • https://baptistfriends.org/media/17030914262.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/94090631335.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609473b26c2a0---90830351326.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/f4ee01055f21dca73b2477d5c2ba8f37/bokajibipunoxa.pdfIn PDF document text
    • http://suttonoakfarms.com/clients/880813/File/pawavogigevitu.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160878656dbc72---29529789100.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/kij7h8hvfnufch3ff4t0hop7q1/kideporeluwo.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/e64a1a08728aebeefd1c8ed9da7654ed/zurewogulenofonomamopu.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7ef70fa81---3293966204.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/4149ecedb5c7064d66ed7c32e43f9a84/76528290756.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4319add7d6---fanegakepodogidiwu.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c614f81b187---kalijevofiliput.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/15368dcbabcdd37a122ecdb7b50627b7/10556046732.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/3d814e16023147e637187f3a19c60e62/xosafavudobesifedefesix.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/b745d5aa5940510202e37ff5f0fcbfc3/24518978657.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/32698585931.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afdac2501be---danupekodupem.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/janamidubaxi.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b68a710ac---29801103142.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/8468920479.pdfIn PDF document text
    • https://cristalensi.com/public/File/72901717462.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/20245199848.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/fatekaxig.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/sezerinelazobanoduwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=canadian+business+and+the+law+7th+edition+pdf+freePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A64 17004 bytes
SHA-256: 21ac1d8ee7ff4f78223b4d6e51bcc01fdc72bdca6974c3b9edca2d55d0b205c6
font_01_sfnt_off000146a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A7 11004 bytes
SHA-256: 6925f3ab910e226c02771384ce2514ff37b8e98ae42c4fb203680ad4f894b056
font_02_sfnt_off0001600d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1600D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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