Malicious PDF — malware analysis report

Static analysis result for SHA-256 d514080c6f50aa6a…

MALICIOUS

PDF

96.2 KB Created: 2021-08-14 13:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 429438bcaab9ea256cadc9d12679792e SHA-1: c6a3e1f9554f221e9b945b5228682955b1a59cf6 SHA-256: d514080c6f50aa6a84c5834f52d19d243d769311e08e8f52bf4f830a1a5140de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution lure. The primary intent appears to be directing users to external, potentially malicious, content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://www.alapan.org/fckimages/file/81413558151.pdf In PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d88307fa53---27057422793.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/mafev.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce9f504038---bokijudid.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e1e26218c839b52bf508b85e874ff7dd/zupofolejagu.pdfIn PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/86195609639.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/topoxudobefif.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5ce078f34e142ad1d7734e15f3c1d11d/xufopakidewajixemejo.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/tasanuvigugijusafa.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984139b1f31---54490227981.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/sopururubelo.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbbd88b89---vekogowapaxu.pdfIn PDF document text
    • https://preciseenergygroup.com/media/86216890321.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/p1duq9okhmrch93ums6jos63o0/18978992748.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/waneronuzal.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/67489184816.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/euh1q2fadddujd1515onll84jk/bakekepo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a78c6ccc0---37646999196.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/titojimovujamog.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706a0d97cf1---35226998163.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/lununedixub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=twilight+6+release+date+2020+moviePDF 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_off000112f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 17544 bytes
SHA-256: da0883305a49b7d90107507896b587ba1cf1c8f472a275116af6a6e661c3714a
font_01_sfnt_off000140e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000158f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158F9 11116 bytes
SHA-256: cff630a564b9fa7bddeeb20941f38ff9219797c1b9b13a9cec64a86720a81664

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