Malicious PDF — malware analysis report

Static analysis result for SHA-256 b632aa282a47b3e6…

MALICIOUS

PDF

78.7 KB Created: 2021-06-12 22:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cc02b38629f03707fc74be64e26ab47b SHA-1: 5bcbf9e3c6ad896502020fca9d61415c3269f777 SHA-256: b632aa282a47b3e6abadeea39654d2c738c00f8a7ac775b9a1253af0f2a7bf1a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, likely serving as a link farm for malicious content. The document body, though partially corrupted, includes a lure related to downloading a movie, aligning with phishing and social engineering tactics. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to further malicious sites or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=vanamagan+full+movie+download+in+1080p PDF link annotation
    • http://toeicspeaking.net/_UploadFile/Images/file/65658886174.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/f64e3ab4a12a406bace0eb91372b4019/87159224012.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/vibineruvajokevikunimowug.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/c3a6185cf2bd06e8f5322de66000f07e/27036212065.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/990d08d3e2a7d77a68e5bb6baffc7b45/89750662311.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/is7amk9h24b55g5th0vi3hhfl5/wopekimazaduziveleko.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4bthc83kc3arvrrbiqp2q53jlh/labaniman.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/85894171457.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/88156540773.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/243a8b78da18057d2e19db21e5308c90/34520327915.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16073ec6520dec---posozevibirari.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/5219c1fbcfa96722f349a327bc18f233/2237584457.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/fajudovolexadolono.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/2ic0eralgr6pbinvp8k0ocdilv/16094753302.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba70a95d4---sugitazekena.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/9172166327.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a1aa972d900---86803642977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65C 5592 bytes
SHA-256: c5b49afc8b90eca253a8b8d08a6bf5c058840155a064062bde2db41822007245
font_01_sfnt_off00010979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 10696 bytes
SHA-256: d6deab67473f8372695589b1d67d55a595f68cfcddf52512c38a2b472d7c2b13

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