Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2d96e8c0a2efc0…

MALICIOUS

PDF

97.0 KB Created: 2021-07-03 02:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bccace8e81435681589be9c32b623faa SHA-1: a4e973ba16090dbd3c2287913607c8535d83438d SHA-256: bb2d96e8c0a2efc03e6f4320e7cf5fc87785a14e389277a1a66b9cc215e0662f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The document body is unreadable, but the heuristic firings strongly suggest the PDF's purpose is to lure users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1607560e3346f6---55470191653.pdf In PDF document text
    • http://ikkosushi.com/uploads/files/topukakipevazubilelafug.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d01c974b856---13486046676.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2f8c92f1e---bekiputariroko.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ecf2db719---38979600335.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6ff807f85---raranole.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/xolofilebuxasesokasom.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/firaxepopexe.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/23833973552.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a832daaf77e---46235515123.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/0klhka9opcdndsdikhsd5lb971/73747387007.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/nigumalarubuxozozef.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/t9ks37i63o62kek6ajcb1qe8nm/54830704159.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5268d3e0e23d6f50645489eefe60fb29/koturunifilukatuj.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/xotegatezane.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/fudeb.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160915790c373a---tazurox.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/ziwitofufimasuzupulisi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608002209ed8a---4450092370.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607199d6a2a05---zesunapizawexe.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c5399de4830f282960630919f66b2920/niwekadovepozuteba.pdfIn PDF document text
    • http://fittbike.hu/files/file/34789619305.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/291214524918.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb784b17ba---34201149176.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=black+and+yellow+striped+wormPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/malusudivojarumutu.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/7d1ee9954e098d2d8e323e5e8fddc568/lejadezi.pdfIn 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://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_off000116aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AA 11020 bytes
SHA-256: 4a574a03ca911d369420e27fe91fc00af512d5ef807a53edff79c798430e19f7
font_01_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 17744 bytes
SHA-256: 740b3218b43e5c915276b778a0a3e02068ed945923a7b468010cb5cd2e2d7ed1
font_02_sfnt_off00015e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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