Malicious PDF — malware analysis report

Static analysis result for SHA-256 07de58c3f407b1e4…

MALICIOUS

PDF

83.7 KB Created: 2021-09-05 02:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 34b0dff8ee685b60f6539d2415aa2ca5 SHA-1: 2cbd97455435648a0bb65bf253c53af14addb20e SHA-256: 07de58c3f407b1e4069a1094aa570bc7738424244039a07c3f40c8d40aa2570a
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/4944024878.pdf In PDF document text
    • http://carlaschroyen.com/content_docs/94906402915.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/68128697179.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/52253a97f5d2e8e38f290e2246e5ecc5/95872383207.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/161efe5b258c48805e22b49f5ec134cf/pamiwis.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/subikiwatiboxej.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/94331829814.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/tuxibejenobiwadan.pdfIn PDF document text
    • http://cordovajewelry.com/images/file/tonopivevazadip.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/91336177774.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/d9fe3ca6adf0cec24ac15439774cab58/71776782180.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/72235722045.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160de82da42905---81820558463.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/401f23a53f1892e2ca0e4926f707d877/50080779068.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa00be75552---zemevifubafomelasubepawok.pdfIn PDF document text
    • http://duef.ru/public/file/44437916303.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/jemerukejedojamexexisis.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/34641394030.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/6678091fb3957b6ca3978a15e10e6341/buvobugaxawodamo.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/3325334523.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/gajubedabeledev.pdfIn PDF document text
    • https://liftsystems.ro/LiftFiles/file/sonunosojoxuwosemejisuzul.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c535a6e51cff6513db854f47aff6d175/febojel.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/tixevokojugekifurobos.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/jubexegenanebukenok.pdfIn PDF document text
    • http://chongros.com/userData/board/file/mapoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=papier+millim%C3%A9tr%C3%A9+%C3%A0+imprimer+a3+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_off0000d7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 21912 bytes
SHA-256: 79e4214b7594d5f1ad5d31a0c22f82718851e72c3876431f3683eba348b65f1a
font_01_sfnt_off00010eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAF 10780 bytes
SHA-256: be8201c0de3b9d57ef109415736e86976d84b35c284e91ef85af0603666d0de5
font_02_sfnt_off000126cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1