Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdae2fdc2419566…

MALICIOUS

PDF

96.9 KB Created: 2021-06-25 22:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5b6dee43c5ff299e8ff0b8837189567f SHA-1: f85bd9e26dfa0486eaf47490cfb7f10413c2bc34 SHA-256: 0cdae2fdc241956662e62be6560c23b76e705ea439d5c6f8aa21a63cfda1c1f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of numerous links and the use of 'utm_term' parameters suggest an attempt at SEO manipulation or phishing. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://garglob.ru/uplcv?utm_term=baby+boy+names+starting+with+h+christian PDF link annotation
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/j3rrf0fb4mk8prrbd9j0nmqdi9/8989818007.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/fupow.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1d57dc622---48146779699.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcc4d72ff6---22565072178.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/38485279555.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/bikagifivipimidamirejesir.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/kitanogogulupomuli.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/17390569962.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/elrdk1recdti1ptts8vtqt0s42/75680542206.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfc8e5931b---90897659564.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa1ce0935b---lusivimozolire.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c1ec7d2fe---vibobasozuferos.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/99241736722.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/14247514045.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3d3441632---37012010892.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8fa3f1601---41136649193.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/4586ab7ae4d00547e85878389484bbdc/jegujozezudizegaf.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/kqqgqr8uhrvnkoqpl2502aalu8/jakasewekiwawop.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e659f9d09b---voguxumojonekadak.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce05b16e39b---fuxonizovufusomeken.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/27e631e181ae3f8629a22bc135c6ab0e/12332437234.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/76934065191.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160947fec028ea---zutolazovunojovakedaxiwi.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/24878257780.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/8fa2492ab823b0ed6006c01542ad78db/71790928653.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c76c785b2c5d9fc44018d260f1eca24a/lavuwixixoxaketafavesuzar.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_off00011794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11794 11024 bytes
SHA-256: 2e7943b77347c21a2e3887fb17466032e712db0918801a97ae255b9dc0e7adeb
font_01_sfnt_off00013133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13133 17028 bytes
SHA-256: 3b2c5db2cbbfe3e40eefb5329029bdd243fc2354f3fc6918400c0f38650907f1
font_02_sfnt_off00015dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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