Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe6d7c6bc56d19a…

MALICIOUS

PDF

82.2 KB Created: 2021-07-10 01:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb423a3d7abc36bbb270b529f07a5060 SHA-1: 37ece8eb5eebbf02f95126945aa90395d0e96c9a SHA-256: dbe6d7c6bc56d19ab32754a1bdb64af5073ac66b90413f47b8cc9a05e6c20118
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or link farm attack pattern. The presence of multiple distinct hosts and a link farm structure indicates an effort to distribute malicious content across various compromised platforms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://coretry.ru/uplcv?utm_term=vbac+meaning+in+tamil
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ej7dggporvim7omcv1bpnt924p/4171558510.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/20753de7bdf561510943f18e8cf61f1e/sosevavidejakafavutafobad.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606eea4d51cdd---78591021214.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/a6set6seq08vcc6rvjp1jl4gq0/28030717809.pdf
    • http://lab4050.com/upload/editor/file/kelosobikajojidamaxad.pdf
    • https://cometsecurity.in/admin/userfiles/file/sufefovakedaj.pdf
    • https://betentour.com/sites/default/files/file/zuwebumamigow.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16079c27a7826d---fakijifomikumapires.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf0a82d5dc---47144984905.pdf
    • http://elhammagazine.com/ckfinder/userfiles/files/1787066787.pdf
    • http://almar-bus.pl/userfiles/file/64742848648.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/faa3de825d48a41eab6f825c7596af77/xepidubewazagirupax.pdf
    • https://intrigantka.ru/images/userfiles/file/xefanogipam.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8b51257cab951a289a9651cd2662c35b/dusabomajaxekolirapugikeb.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/060v9q58giii8jv4iogmqvgfoq/kujebi.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/824a43f58efce93f62b905d17a307a87/32869734286.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d88177f39---79454495595.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/vojrfkm9f3fv9nbc8lbr4a2iel/mofaz.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608758d32e969---pefufivutibanumazomak.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cb9cd4646c3---52143022684.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a8c0e488e75---19532662076.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c92b47ca713---48249483120.pdf
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b12e69b599---wezametipididosud.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090955455e57---34227084549.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 16792 bytes
font_01_sfnt_off0000f5f2.bin
67e0ea4f736ecbb8044823a39a31b070f8c85600c3289a90795219949c267ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 17296 bytes
font_02_sfnt_off0001231a.bin
6251357415dc80a955d4b416a58b5733a7840135f8a78f4374401da40a189706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1231A 10292 bytes

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