Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdd111516951fa4…

MALICIOUS

PDF

77.2 KB Created: 2021-09-12 13:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3e1d67f3ec56276d71d50751fb8561e2 SHA-1: 3c5add33d15d74e3a20e551d0130c2b9a95eec7c SHA-256: dbdd111516951fa402f28b7d54bd3abe07176eb062891a94bd9208fc46d7341c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 https://oniceh.ru/uplcv?utm_term=farming+usa+2+apk+original PDF link annotation
    • http://delta-serwis.pl/pliki/tobujirivarorovuta.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/49977273480.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/16474194984.pdfIn PDF document text
    • https://j26clean.com/upload/files/96814836969.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/sarize.pdfIn PDF document text
    • http://hmed.vn/upload/files/21335607223.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3e190dbe5---91563873949.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/jimirufasuwarorolezena.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613412ad001f5---86629786004.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/15292036349.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/sutukusivegufo.pdfIn PDF document text
    • https://partnermind.cz/images/files/sokapizabubemenofuba.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/34194246732.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/budelopupajo.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/poxejerorugomegumo.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/kulugavogifajawitarobe.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/35884832514.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/xafodanodeluwevezasivuzul.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/katutogitesozo.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/girulugawipupeziromud.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/67550263367.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/e80feefd3dda748df8837979fb26951b/76641180320.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/fiwatujukowegilupoburojog.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/22346268927.pdfIn PDF document text
    • https://autoskola-scp.com/files/suxewufemox.pdfIn PDF document text
    • 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_off0000c9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BE 17720 bytes
SHA-256: e60d04da2dcec9f1c10c47043f37b7036b56e0adb3fb6aee8610068ce7492f7a
font_01_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11032 10656 bytes
SHA-256: 60ab6cb212c26e0ebe4335a18ce7a7460b1aa7b69aec75d2c9206ba18b8e88d1