Malicious PDF — malware analysis report

Static analysis result for SHA-256 002acf2214ced270…

MALICIOUS

PDF

69.3 KB Created: 2021-10-10 17:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b7f76bf21e849068c016bede33a7f342 SHA-1: 991724d5c0f18e1b31d87f1f5447c5502703da40 SHA-256: 002acf2214ced27001343f2c88e95eac1f71140101ff698780a085bb14a94a81
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream, which is a common technique for executing malicious code or redirecting users. Additionally, the document features a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to host or distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cafemocion.com/userfiles/file/34659427366.pdf In PDF document text
    • http://qunjl.com/userfiles/files/75068978288.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613439d7e76f7---fofojeweduxedif.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161390681b0291---5806259572.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/16458365129.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161522b6207886---12122999583.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/55774340976.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/pabevipavidubo.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/bapojojodidexusotemazobu.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/wagule.pdfIn PDF document text
    • http://canoeing.by/pics/files/1163265085.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/99170778806.pdfIn PDF document text
    • http://splogservice.ru/content/files/luvuzorugawirowesused.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/zosuboteborodirad.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/36951738316.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/f1d11f79ce1b2ed004d757fd3e215ae3/xuraxifexizulegoz.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/69471571148.pdfIn PDF document text
    • http://adhunikjewellers.com/ckfinder/userfiles/files/59480317019.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615714348d523---filimitunutuzerapagif.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/fujunoxobepekesoxotipu.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/36736939687.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20211005174850.pdfIn PDF document text
    • https://flyags.com/editorResources/file///33434873009.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=too+much+phosphorousPDF 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_off0000b559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB559 10068 bytes
SHA-256: 529850209f6f8cbfc66256a5161bdb6ac83cf4ec8a8ff8706ea6a5a035d141d7
font_01_sfnt_off0000cbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBA 14616 bytes
SHA-256: dfd02a31f7e195309495106f6f70a79e7668cf833622fe79af3b2c4dbe8276ef
font_02_sfnt_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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