Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df4cd00328b734a…

MALICIOUS

PDF

98.2 KB Created: 2021-07-23 07:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e093f533ceeaae32b7526e91b1b833f0 SHA-1: c1a15772936010ef2d803794e74c9ac6b1e389ca SHA-256: 0df4cd00328b734a51980c9ae2a7486ffaaa680952fa835ba9ae6338f6376ad4
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 0.9875

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/26204c40da5ae7c84e1fd5436b458099/79638724822.pdf In PDF document text
    • http://capital96.com/userfiles/file/31312396067.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d1e7aa742---5148014916.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/21555030750.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/43139885154.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a63cfd7f---bovufusajafekorameke.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/kudinege.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/81159492413.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/885eab44a84ce554458d996b0afadd28/44013334803.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/3942369421.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/wapojebarovarukebal.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/30021959266.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16088bc1b6f27b---59912343050.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607897e772af6---zujotepugefibavegerixim.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f5141efd3---21873635538.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870e85815c9---soxulopenofojijopozepodi.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5a9343ab8---xevivazejikesofanolusif.pdfIn PDF document text
    • https://dla-pracownika.pl/pliki_user/File/26295174516.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/44a0b232a6aa2a6b06c8c0e72c4f0a41/xemurezodasini.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/75987538558.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/gejedematolevepidiruv.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/wipetadukipolad.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37967834618.pdfIn PDF document text
    • http://kleiberit.ru/files/file/59840410732.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/596c1b960a5e6809c8d4393ccbd2dae1/4349391744.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/9dr0oft2krg41ia4e5mv5hefse/volopelimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=all+seven+horcruxPDF 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_off00011e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E82 10224 bytes
SHA-256: adca96f460d018e0852905728b213d5e92439e3662822d7d2b88a1e01947ff21
font_01_sfnt_off00013575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13575 17268 bytes
SHA-256: b80fc203d9eabb1f84502420b67d55ec824fd65427782b15083cb09f7b43696c
font_02_sfnt_off000162e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1