Malicious PDF — malware analysis report

Static analysis result for SHA-256 00270842f8193a02…

MALICIOUS

PDF

98.8 KB Created: 2021-08-17 02:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 3155dc503ca89ab204110619b567617f SHA-1: 31dacaec361200659e58890928ea79a40d5f5253 SHA-256: 00270842f8193a02d32f8cce0892bffa5f720ecdf8f621ce5cc550a82b9ba9a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/9ab51d82382a48a996e900260ce240c3/36479804409.pdf In PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/550516c8ae9616423ef25333e51fe455/30849831513.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16081c1b7d7cbc---fowexokasakuwoj.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202171430185736.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/nazinitemagerejonexifi.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/19684703896.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/jipijarusaruzubewenovud.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/zetotuge.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/95961801390.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a90019d3eb7---5284243745.pdfIn PDF document text
    • https://esvigo.com/upload/files/ditavoxerorite.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/97115489881.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/90788379114.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/fbfdb06442ce2708ac6d54c91623f15d/gimunuzogenowalini.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/rakifufimakazabunagere.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/be63d7d119af3e06a6ba8629d2a70046/65557774024.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b22477e267---65034178522.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/sesugoj.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/zawowuneje.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/r0pcvdc4b1962eucpqh6u7fhfp/34128641865.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/xejolavonopipafolevoz.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9377090a2---talilawulitadamon.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e34c97e8f0---31833352850.pdfIn PDF document text
    • https://seo-methodes.com/userfiles/file/90722575507.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e7a7e9e7e---32916090281.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/drg58ip1h2gatj4gudiq55pum9/wepiva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=indian+biodiversity+hotspots+pptPDF 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_off00011ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC9 10712 bytes
SHA-256: 9c14ef9aa2ac0389f4c9f4d415e352771f72f479ae97f0d8e5fc648cc8f9b3d9
font_01_sfnt_off00013723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13723 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F35 17204 bytes
SHA-256: 389a7bcfd0fe7bcc370d32e78b85435b723ac79ebed3972b939b3a8cd850f966