Malicious PDF — malware analysis report

Static analysis result for SHA-256 f042c1b20795ef44…

MALICIOUS

PDF

130.0 KB Created: 2021-06-29 09:56:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e0b0a6f828aa6fedcb9a152ea6bd1ff3 SHA-1: 2833c52a270a295ae722a08ad4e5948e4b1f3136 SHA-256: f042c1b20795ef44ef8a889a04c929b66a3d70358a726e8f8a3a179081e5077b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9465

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/zewaboxuziwikilaput.pdf In PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/fb12e2d463d03886ec58152585ca7cc8/duvujetalefipiguxitir.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aab2b7ace5f---lutesuwonorug.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/acbfdd74e397827e30241ec2856b0d4b/libopokenoruxijugez.pdfIn PDF document text
    • http://carszana.com/image/upload/File/66007319929.pdfIn PDF document text
    • http://iltorg.ru/upload/file/wogopel.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/neloxexososogasewiwuzesoj.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/10257fd4891c3136e0244f5cf8cfb8e6/87422494023.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098dfc9a614a---61371530427.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/14236873038.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e0cc68dc---jutomilulirosebex.pdfPDF link annotation
    • http://ackerviewguesthouse.com/userfiles/file/91925017361.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/f62af09aa13550876563804bf1d43047/xoxegakupogolawema.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/zufujepuvenabukipotabur.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/49930432228.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085569f0658c---7220518159.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/33780726544.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cbb4d56f2---tolobisusakewelever.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf993a3fa3---kekavirezagawunuletidide.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/nuranorakunugu.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/77198607336.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/0e7vcik4l9q6g15cfpvdnqilni/71843729299.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/b6f188cb6337a094463af01fc0659910/fofelinudotegojajoxelalog.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/vaxesademezavutakosopoles.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=lagu+i+like+you+so+much+you+know+itPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35B 10924 bytes
SHA-256: 1b4fc26fe6557a35a231deda90b918205b10841037bce47a448a60a21513de0c
font_01_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_02_sfnt_off00012202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12202 17148 bytes
SHA-256: 0a7131676deb7f4a419e1cdb38c421ee92f1c46fcc961e14d4ff65eb5e7ef6f3
font_03_sfnt_off00014ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF7 56820 bytes
SHA-256: 00b3637483c44f638030d390e5c9596876048df5ea39835baad9f73988dd94eb
font_04_sfnt_off0001e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E16D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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