Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daeef02ebf95098…

MALICIOUS

PDF

72.9 KB Created: 2021-07-05 22:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0f8095799103ac40faa5263fec41069 SHA-1: 7dd542cea3b63084fc5fd97b814e5f2e632b5fb0 SHA-256: 2daeef02ebf950987b376f905d03417c8ed6b6f27ba7087486f717ced7013a49
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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://tv-sat.cz/userfiles/file/64819639718.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/ecef62b20c6e1d54a04510b0acb8dc02/fokulawovawenidup.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/9dd6a2ac291bcbe027c2356f8b2cbacd/27701447283.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1734cb828675a8ced90f205bb3e7e86a/setitinafame.pdf
    • http://tajeer.co/userfiles/file/63479152082.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a491f9c34cd---45911149531.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/8d925c6073a2f2c016fa69a4ebc32e68/gusigedinujolasixupoge.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077be666d0d0---32781731409.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e2d72db07---zudawulabixafa.pdf
    • https://1877painters.com/FCKeditor/file/defefoxusilizoxiwedanumo.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16098acf02a4dc---1115330062.pdf
    • http://pitchdecor-construction.com/user_img/files/77749829541.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24fa0e065---jopudegomidarisitaru.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc203d5e9a0---32399699946.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/59f5b93991b73c8a0865f09b216b0e96/jutibiwopubojirozot.pdf
    • http://cancercareresearch.com/userfiles/file/68383063403.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/31236407a43b3953092b7c38471bba39/75737463060.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab39e689218---gesagarigavewe.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/medaxiradagifedu.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/59c2b8f8a66f9002814843e4f72703d3/mujesak.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3b23135cc80e193b13064c0a835c21af/kimibufup.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ec38c0fb6---10645318760.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c864c54600---89068961471.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a273ec77bf6---vifuvibupavitikosese.pdf
    • http://hud101.vn/webroot/img/posts/files/dovivagaxifemivur.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/da7a80ba7a4ce82c64f84bea8668ee79/lenopugibolaxol.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=lesson+7+7+multiplying+polynomials+answers
    • 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_off0000bebb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBB 16792 bytes
font_01_sfnt_off0000d6d2.bin
12b7ab49acc1960349f55b5aeceec5667e46f564a5efc7a20096c80092908e01
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D2 10900 bytes
font_02_sfnt_off0000f027.bin
487d0408e964b902e72cdbd2dfdee1d5c0793b7cd50bd31e296cfe7686055e17
pdf-font-stream PDF embedded font (sfnt) at offset 0xF027 14976 bytes