Malicious PDF — malware analysis report

Static analysis result for SHA-256 98267959d6a00dfe…

MALICIOUS

PDF

87.0 KB Created: 2021-09-06 15:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 49c2ae4e37737717f7ffa11ea628f37a SHA-1: bced637dad7e41dd6c6351d2e09b9c47aeb3beee SHA-256: 98267959d6a00dfe62acd7a31b6a1559cdeba709466da6120709f672314f5945
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 phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a link farm designed to redirect users to malicious content.

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 https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/6cc7e16984587754b7409980d4751e9a/93133507022.pdf In PDF document text
    • https://huaku3c.tw/uploads/files/202108170131308821.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/livofubowufigun.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/sarirojemovawoxugi.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bd803f5f06ce25e3168e7cc5e5bfe1d/84814833309.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/58998604871.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/41304312215.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/94775681797.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/farajij.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/zenexefozejevokuzomogiviv.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2mhfob4ss6v6dja8ilq9asql5t/57511739343.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e7f93ac95802e597ea59a93a03fee6ff/93303378196.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/kelobutixowafiw.pdfIn PDF document text
    • https://alutat.com/data/file/ganefazoxivani.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdce3bbfeb---96333150133.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/97491533350.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/nesobufuli.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/31241776535.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/kisage.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/72261673184.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cabbc63ffd---gopojomerawo.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16121a5bc937fd---23196853044.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/lijavufizajije.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a9f7331c784059c9dff3c906e872e77c/5375522928.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/15c1e77f91bd008bb0379f3510d2a78c/bivirewebej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=jura+impressa+c60+service+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_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 18128 bytes
SHA-256: 8fb9efce9f41e98ddc7d5721122556e9f7f5bc3be9edacffe18ed35a6b012ea3
font_02_sfnt_off0001352f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352F 10764 bytes
SHA-256: bd2dc3aac798741c05395b87a970d965b2ada779d30d2aa66768f983ebc40f13

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