Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e96401b79e48830…

MALICIOUS

PDF

86.5 KB Created: 2021-09-02 18:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b7efc55798d45998f2df6b68af6599b3 SHA-1: d80dceb8f0332adbb8caada843c449a52b3b7db5 SHA-256: 7e96401b79e488306c4ed3db859d750a0befd23a0343b5a8ed3fcc70f557f04b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the detection indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://toyteepee.com/uploadfiles/file/210716013511190141u1y41c.pdf In PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff677363b8---76106332506.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab00227623---36928143384.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/161296b84a8dc4---nebolimenirasupanar.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/33294173497.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/pevosatazufiwapenowa.pdfIn PDF document text
    • http://wfuchiomega.com/clients/4/46/46a815049f9cfb11ab63b386d19cdfb8/File/jakesofuz.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/rowazevituvewer.pdfIn PDF document text
    • http://nomorecpapmachine.com/userfiles/files/73651432801.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/dizex.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a12fd800790---wimiragebexigediwolop.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/5m192aqganjcfq5aa2ul6b5aqn/mikizoz.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/sonudilimudotuwiwobezu.pdfIn PDF document text
    • http://renovator.cz/files/file/67776843037.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/10784591939.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/wuxabeguvorugofi.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/xutuzibagoritezoti.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/sefavelapumanikem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d644717fa0---63246178781.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/zefuka.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/movefip.pdfIn PDF document text
    • https://aporpeter.ro/userfiles/file/latisorezox.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/3f1b8b5bff97863e37e02d6b31bd3eb3/nuvotonuwamosej.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/48668343410.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/66195403024.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=solution+stoichiometry+pdfPDF 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_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 11012 bytes
SHA-256: 220ec03c01351106dda8ef2d7b1239b7ca4801a21576a494d3e5399c8caccd9a
font_01_sfnt_off00010497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10497 18392 bytes
SHA-256: a36a7204867a3bc37a2d4bc75eb3b5f78db9960aec7ea75440e39030bc7b4cb8
font_02_sfnt_off00013426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13426 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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