Malicious PDF — malware analysis report

Static analysis result for SHA-256 feec6230b6c8a32e…

MALICIOUS

PDF

87.9 KB Created: 2021-09-18 09:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de6d43680ba86043f5bcd625cf646c30 SHA-1: b5982abcb20e55ed241ca13abbb25387ef3ca247 SHA-256: feec6230b6c8a32e027b64988aa725c30ea935e771c59f79d103e6f0b9781293
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The presence of a link farm pointing to WordPress upload storage, specifically at http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2987f38ec---85495860474.pdf, indicates a potential distribution point for malicious content or a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2987f38ec---85495860474.pdf
    • http://www.painters-restaurant.com/userfiles/file/18164827574.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613946a6f3982---73020657653.pdf
    • http://ministryofrum.com/memlogos/file/86998210285.pdf
    • http://originalbau.hu/imagesfiles/vamijer.pdf
    • https://sindonis.com/userfiles/file/burigejeresutujejorom.pdf
    • https://tekmaker.com/upload/files/74808074473.pdf
    • http://charontrade.hu/data/file/65793490735.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/1d268ac2fdeefcc60fc1dec78b09affc/17960747882.pdf
    • https://www.ijestr.com/ckfinder/userfiles/files/24022612032.pdf
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/52042859727.pdf
    • http://bubb.cn/up_file/file/naxukaworebapuderogidotos.pdf
    • http://webspace.mysdam.net/images/newsletter/files/78200224614.pdf
    • http://deaprogettazioni.it/userfiles/files/28661832896.pdf
    • https://anfauglir.com/images/file/jiluxixakojin.pdf
    • http://wohntraumgmbh.at/vegevux.pdf
    • http://cpgny.com/userfiles/files/mifowexuborodorubiv.pdf
    • https://www.nickelmarket.co.za/includes/ckfinder/userfiles/files/kesal.pdf
    • https://ataru.site/js/ckfinder/userfiles/files/kigivulogizojakitobuwu.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/b74cf13f84d031ea6b0150e40370e055/kodelovosijuw.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c9c4a08cb---67305373121.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/80481925381.pdf
    • https://osikovo.eu/webroot/img/content/files/44743354317.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613de25d1e6b0---xizotatupixug.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/h9afgvmm9kc338pivcve6k88v6/54864226978.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=neil+gaiman+fortunately+the+milk+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_off0000edf2.bin
04cd4f3bf74bf83c95c5b66b69d647ea6fc45ce48d8e2c38fe1dfb81b72ed9c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF2 19216 bytes
font_01_sfnt_off00012030.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12030 16792 bytes
font_02_sfnt_off00013847.bin
0d9050a5f9b17784f0c2613300f605ac9f52316651df28e4c41b4fd9c4b70d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13847 11060 bytes