Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed12edff956e4b17…

MALICIOUS

PDF

88.5 KB Created: 2021-09-09 18:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5859f2b47cfddfe95cfdd88e01bccfd9 SHA-1: 6caf8e092cf12b937b6d247aa2e605afc0ed8e51 SHA-256: ed12edff956e4b178f1be2d94577285044fb169f6805ef109b5a51dd21f6c21f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a technique to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://deycaterers.com/ckfinder/userfiles/files/piruwisulamijajid.pdf In PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • http://koreaseowon.com/ckupload/files/modajonafozivovumi.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/57944922109.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/tusujeme.pdfIn PDF document text
    • http://aqua4you.hu/userfiles/file/texazekusivanapa.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/d43b9c5a63d0c2f279facbf1491518c1/vogeduvapur.pdfIn PDF document text
    • https://frutalmente.pt/site/upload/file/dixeneluzefowifazijebulo.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/84112124233.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/85150327378.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/virizudasadete.pdfIn PDF document text
    • https://partnermind.cz/images/files/wibamirabowuzipaximebiduf.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/28878742633.pdfIn PDF document text
    • https://x-software.cz/data/file/jufeneximivodowe.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/kubimijozurogules.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/buwag.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/57cb5bb43387cd66da1762d096fd75f5/juxugewa.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/parobi.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/15215194601.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/25705315452.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/22216104547.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/98944315657.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161332aa093d70---vawepegifedimapag.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/nakuresewexexogatufogof.pdfIn PDF document text
    • http://www.heksan.com.pl/file/xunatoba.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/67087336838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cara+membuka+zip+di+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 18148 bytes
SHA-256: 6d7402a78ad852442283bdb13b5406fc5b9b23d9ca0eddf74120ae0e4a9db7b2
font_01_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0D 10664 bytes
SHA-256: 83036f5a1dc8396c145f3749004c97d5a3877e2d16fd10c7d54e9cf521d30f9e