Malicious PDF — malware analysis report

Static analysis result for SHA-256 47277ee5f9a13b7d…

MALICIOUS

PDF

85.1 KB Created: 2021-09-18 08:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db94b7689448184842b216f031e47094 SHA-1: 82fcc8b70cec97589e4fff473c12a880a2eda4e2 SHA-256: 47277ee5f9a13b7d91e9d3f7f1ff3d34af4491393dc9008c325333284c04a886
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://garglob.ru/uplcv?utm_term=best+family+games+android
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca68c0e636---zitikulijod.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161317dfdbe336---parebaf.pdf
    • http://hzdsbg.cn/uploadfile/1630536556.pdf
    • https://cgeminfos.ma/upload/file/59140260223.pdf
    • http://udelimpa.es/ckfinder/userfiles/files/26526228320.pdf
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/nenusepoxepisixike.pdf
    • http://njxinbell.com/upload/files/38645032494.pdf
    • https://sokolzgierz.pl/web/uploads/files/bekilefebinukolux.pdf
    • http://myxroad.net/upload/userfiles/file///pemip.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614090f23da0a---bumevunemederajimolere.pdf
    • http://biirbeh.mn/images/content/file/femefirijiji.pdf
    • http://bulk-supplies.com/userfiles/file/fewatakerasomuwe.pdf
    • https://moraure.net/js/ckfinder/userfiles/files/60762462961.pdf
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/1527100030.pdf
    • http://cyclad.org/UserFiles/file/faxunuwujatarusiluxilel.pdf
    • http://administratieindex.nl/images/uploads/retokuzuf.pdf
    • http://locke-3c.tw/uploads/files/202109021812109706.pdf
    • http://surmounttravel.com/userfiles/files/petisugad.pdf
    • http://netmode.net/app/webroot/uploads/files/xerib.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161438afc36078---4371275235.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137b4edd2945---lapobisapevurosegawatin.pdf
    • http://fkm-lux.by/var/upload/file/genini.pdf
    • http://musthighschool.mn/ckfinder/userfiles/files/86620728000.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_off0000e7d9.bin
a50af1d515aa0168d596674ed2b357a3ea289a771c63754cb952be0e8328f2df
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 17740 bytes
font_01_sfnt_off000115bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115BF 16792 bytes
font_02_sfnt_off00012dd6.bin
bc21bfbb2f30d13c0a6e2b3e2880391bfffea185401190d6391d943d93d1f651
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD6 10864 bytes