Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0ff2663287082d…

MALICIOUS

PDF

89.8 KB Created: 2021-07-28 08:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 47e01288851f6c1205ef04fd6295de08 SHA-1: a59ed2db8fecc3a78f29e1a7ad32c09478d82bc8 SHA-256: 0a0ff2663287082de09c9c9d08b24a1aa396e08bc47ee0d7b718d0eee3697f71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/64e8f14e8f64bda97ac0821af679b2e9/marukanuxeziz.pdf In PDF document text
    • http://travelspace.pl/userfiles/file/3878012924.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16070f355e6a0d---74363279641.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/xikosojokezodib.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/c16997ef13602f0fcaa104821519b69f/garapoporatudilem.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/wosedofekegodazere.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/37345599854.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d469be725---zuxelelogegawadosore.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8f340e3ceec3f13e7892bf811b7426ef/wigenutumaneruwokexafot.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/98837166473.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/58542731165.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/jexizowoxonategowo.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c984ed3d7f---desof.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/8892eeb9e90890c9170d1647189c18e0/lexiwemitinigekakofaxabek.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/salaso.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/tilodivadexaxafegebusaguk.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210616225627.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/afc3cf39911dc18a4fa7fb9262e96657/kexodotivazuperafo.pdfIn PDF document text
    • http://wphs67.com/clients/9/95/95f8299e8098c1f2c85aab0f7ead5e97/File/murupibexuzuvij.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/47944997115.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/puxabofoxez.pdfIn PDF document text
    • https://starbox.fr/img/files/fesuresewu.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/diloj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=an+introduction+to+genetic+analysis+7th+edition+solution+manualPDF 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_off0000f635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF635 18332 bytes
SHA-256: 85e0a67a5839f068e35d39a8dbc577369e2ff043d176c6b9b20d5d6d7c4fbffd
font_01_sfnt_off0001264f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264F 11064 bytes
SHA-256: b59d7ac0117ed0d9d4fe43aa93c4ae21887710ad2260370b726464df62098f5c
font_02_sfnt_off00013fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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