Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02ac1b072b81dd1…

MALICIOUS

PDF

81.3 KB Created: 2021-08-17 14:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e48a0ddec4e92194904d8ecb74fe2f91 SHA-1: 8cb56358a4218a01b8563674bfee3caa074200fa SHA-256: f02ac1b072b81dd1313f625584c845a2d36bf8bdfacd5fe971ba6a145a5a0817
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://jagatjyotischool.org/jagatjyotischool/userfiles/file/sidez.pdf In PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f24a32012ab---wokotupasa.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/12384239771.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/58020291476.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/noduba.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/11163292893.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/jodugijem.pdfIn PDF document text
    • http://sowitech.vn/upload/files/mixodatigomop.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3a18710b9d920928491dcfd24e437233/90445831217.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/gj64i8quqdtiq0tn3ev0pt6usq/wetexoronalujoredagawefer.pdfIn PDF document text
    • http://chapelguild.com/images/usr/nexumutunedagubaga.pdfIn PDF document text
    • http://tipiland.net/upload/file/29681012541.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089396102959---zifuzijamakutasekofej.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/66ce5d0af1e6d6bca187b01e49b83c49/27448328776.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094a0ba05892---3963818429.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/97952387299.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-08-09/c51445e7af44e002a03f40976d1c462a.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b26ddfcbf4ad71ba4592ff3c8a5ec6e/delukasepivobodokure.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b24a105f05---94027961009.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/8298b24a68dc574924ce2472be91dc42/girasupudalesaxovusiso.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/44c1e5e7ad5dc0c700ed9323459fa58f/47074930461.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/dixemizuguzepatiluxiduge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=get+the+message+worksheet+answers+algebra+with+pizzazzPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161146fe0a1cf1---lelixoloviso.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_off0000dc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 15704 bytes
SHA-256: ef1a4b11e609152e0aa117e0b87dfa5327f386f6d0d5735e2e5a8affe01cc302
font_01_sfnt_off0001049d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 11116 bytes
SHA-256: 9d7272b391abbd772c60bfd1dccf6b148e677f5f3b1fa95dd278bfe0d04edcdb
font_02_sfnt_off00011e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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