Malicious PDF — malware analysis report

Static analysis result for SHA-256 f574e36c09b49618…

MALICIOUS

PDF

85.6 KB Created: 2021-06-30 22:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a563ce1b80cb9390cb1fbc2f285e8a85 SHA-1: 3a499acf639b4a7350bde5cace284354ac3613c3 SHA-256: f574e36c09b4961829f820a27a45c6803f9b85f8fd2da405c259257a45feff51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary attack pattern involves directing users to external resources that are likely hosting malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f481a3537c---22243777096.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732bc6be202---mupizuke.pdf
    • http://brandnewgoods.net/userfiles/file/gupusal.pdf
    • http://sl-light.ru/design/img/upload/file/38768829334.pdf
    • http://kp-technik.cz/ckfinder/userfiles/files/zolelemipokipok.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080028c10ad4---37537839278.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c41c9d67b05---95560974310.pdf
    • https://myphambambi.com/webroot/img/files/79125310686.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/nhlf29g0nb59dfvbut75p4ppr1/68928874938.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160848b60f1d79---zikelidizoj.pdf
    • http://peaceinsrilanka.lk/userfiles/file/6858249070.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebf18c6d89---bisozexuneb.pdf
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210624010043.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c6ed5669adbe181d923854b8f57acd16/97161877635.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160708027ee2f7---wadororinukaxis.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082bb48c32fc---56486939498.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d678507268---82620700635.pdf
    • http://lapenya.cat/imgjovesnaves/file/35751956341.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160849dec7eaf5---35421710653.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c21041be080---41245068021.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/foq37p1ufg33eub993mi2n5uj0/25133993814.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d7a7d38cc3a90acad120940a631523b4/zekigamin.pdf
    • https://digicpictures.com/downloads/sinerotopidonevesemi.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/dc7fa0222829f729d7d81bab00c11764/femomedefupev.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=igi+game+in+android
    • 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_off0000ef7b.bin
c5117f08cb79b7d227b09809018bd4ef08309c940ed6b52936fe527a1e60e58f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 10232 bytes
font_01_sfnt_off0001061f.bin
28b9fb47b5b2779358e1569ed729bd49918298d5d78e1506c5f60c2bf6c5b41a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 16564 bytes
font_02_sfnt_off00013140.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13140 16792 bytes