Malicious PDF — malware analysis report

Static analysis result for SHA-256 249966dbfcb946f3…

MALICIOUS

PDF

87.4 KB Created: 2021-07-03 05:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cafcb4ddbb30c8c5da6a5cc43707b257 SHA-1: 000e960440c8efc9e42ce272d3c2b161a5df6281 SHA-256: 249966dbfcb946f3cfb3247304dc9e91735c0994e3e6d04b1da82b11f9c42388
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. The numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggest an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca74649528---73842234775.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83552c9a1---8148005413.pdf
    • https://nhachoxebus.com/upload/fck/file/poborukorafujovobabom.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5788a2f56d1b6d67763a177c7af1c10b/lotejilagu.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd676f2040---66791763353.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/25935671205.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4d9a67533---nexubuzebinefezewe.pdf
    • https://global-product.org/CKEdit/upload/files/24298449794.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/22c7fa348768d3b808941e62f372ef5c/46806259968.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/84829666075.pdf
    • http://micronforgacsolo.hu/UserFiles/file/giwuvozugupesul.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/22805040569f31f65ecd60a468234047/kafivaruxedazisev.pdf
    • https://pindimana.in/uploads/file/lewofujamilituxise.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f6ea3665c4b7d8429b3c0c24e21e2552/pixikuta.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/98093139422.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vg5h809mi9nbmu0dgui6m1ub67/95647025962.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/52d2dd70b560ece71282547202f73a4d/17115416764.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/qst1o2ekf63pp1e2b8vjtbtfig/nedufikuluguninurakexa.pdf
    • http://danchrisjewelry.com/userfiles/file/kebuxamekivevedovi.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b531a720f---kilidob.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bceebd20468---zofaroreziragepiruxi.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160828b16c7612---46529457320.pdf
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/xizolofojulobowu.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba24740e2---duvuxaminosorew.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=mp3+and+mp4+music+download
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/bff783cbc5d308d2712f0513867af846/xujabozeroxefabewo.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_off0000f17d.bin
5de5d6fd592f683e26bdf155c52c3f931b471ddc0b0cbc7098fd3c6235eb9392
pdf-font-stream PDF embedded font (sfnt) at offset 0xF17D 10772 bytes
font_01_sfnt_off00010a5c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 16792 bytes
font_02_sfnt_off0001226e.bin
73c084ea546385b030a722140a71be8b5f9f239a50324fd0848e1645d4be3de1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1226E 17536 bytes