Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96961343b5885ce…

MALICIOUS

PDF

82.6 KB Created: 2021-09-08 08:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3f6bbb0ddce88486cd85d875dc65700b SHA-1: 5bfe2844e089a3e091f5fecfa8aff252f891d627 SHA-256: b96961343b5885ce87ea6ff8f795136aea6c372b54a73f6b9a899ccf42fe72bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810de81a3a7---96605380323.pdf In PDF document text
    • https://myshalewell.com/userfiles/file/regemu.pdfIn PDF document text
    • http://spearmanhsreunion.org/clients/e/e1/e1754705b4c076d7cd520c5e9e79ed07/File/vawerixupaputuwonomokoxom.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/6080196325.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1610c205d012fe---vamini.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4c8541a8e2b01fb864bd1b322ff10599/desaxopinilixaku.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/weboge.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/29994760553.pdfIn PDF document text
    • https://shindah.com/images/ckeditor_img/files/22657952607.pdfIn PDF document text
    • https://actor-conseil.com/files/file/zusuxo.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/75247949162.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01899e686---kevuwetizelipulo.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/1b72fab8c24a25ec447b9325d9034e79/53750363793.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85e2ef8ef---7943445197.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/c80b5e0766ea4005b52f5447fc2916dc/kotesurorenelol.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/c27bce8ea82d4fca20d2c3bd0fd15e07/pesexeduveposavibusazerow.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/42518104378.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd6c2e4af7---nunupewanelaliwovijevi.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/98649901904.pdfIn PDF document text
    • https://airbays.com/userfiles/file/tigufaz.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/galemexubejalarojabi.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/81795320013.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/zeruxari.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/232dc5aac363062172bab337cef80e27/ledeje.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/84641401325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=simple+present+tense+be+worksheetPDF 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_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 10748 bytes
SHA-256: 6add20c6feebb06eb1dd43382fc2dca8c64177a5a0f14508a2aa413167b0b6f5
font_01_sfnt_off0000f8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B1 16960 bytes
SHA-256: 258932170815cc34182fd827a354a24ccfa35ced80ebf13f51a43adeaddc8ea9
font_02_sfnt_off00012482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12482 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1