Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab603dd549d622e…

MALICIOUS

PDF

97.0 KB Created: 2021-06-30 06:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d8f41be07b8100c24c542c833f47224d SHA-1: 894612e0a0ef712c9fc74f04040efe6d021046ea SHA-256: 9ab603dd549d622e12adc68d11f3de90ff1a16a5cfc256406a1ea6920d386dfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known malicious PDF campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=give+me+answers PDF link annotation
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca464cb470---56924858280.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30839617218.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/oo8o5cp4dupco9rhvpu2hesdkb/56281230434.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/45182743357.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/886152daf02e8d847b82736cab64c083/87044495622.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/8b2e590bb24fa697798f22cc1c10ac2e/jaduwenimijominubujut.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/wosuwulako.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160846979e1280---63787599078.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/90335377205.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f797e1922b---mafexo.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/wozazavazewo.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/044ee3c74f97dd4f925c3825cede87bf/rililisoluzaw.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/fb8e3fdabe25b164d5f99276d27dd19d/zutubolorutal.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/dk6hqf15escgikbgdqklki27bf/36368227019.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/88924577735.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cf55hhm6kodk6fj8a6ql4apmer/60242682284.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b78966456c1---fojuxavokomekigexar.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/27811497503.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab2c42d41f---zixivijumadevemujofodu.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/9388702868.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/famuzesamomilakupar.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/53l09onrm5fp4cr9mj7hd9hn5i/nateg.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2d39cbf089e38a1f6544192cba6b50d4/finewamawuwim.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/11257090408.pdfIn PDF document text
    • http://zxsolar.com/d/files/xukutetujutuxemibagerof.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10402 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C19 10196 bytes
SHA-256: 5cf30a87b36719e70e2a7406ac8ce1f2c37c82d02c6fcc95829db68f8c0abe5e
font_02_sfnt_off000132f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F3 16268 bytes
SHA-256: 4ce60333086414621b411874360a957007cd958c7bbe83efe48d5798138ab069
font_03_sfnt_off000148f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F2 19376 bytes
SHA-256: a751fa03e486f7f88038d3c6041a51e8129df0516ec6bc2b027b5aa82045e0a7

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