Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c0fcc795c66994…

MALICIOUS

PDF

86.6 KB Created: 2021-08-14 00:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6cac9a7908da1b46eec4ab63287f5924 SHA-1: 0e75e4c8a2a54d40ac30b2f833c401313cf8c3c0 SHA-256: f6c0fcc795c669949ee3cdff279e046f4d5690d1a78daf79c62abe1375b8ab68
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. It contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites or disposable hosting. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the nature of the embedded URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pixomot.ru/uplcv?utm_term=covert+camera+app+iphone PDF link annotation
    • https://hophamthaibinh.com/upload/files/jorugegiw.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16087228a75e8d---99178014171.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/19722558409.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/254d857ce65b7c859d19fb3b7bd2a84f/99157849768.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/zowukisijaxem.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kedifavudigelexu.pdfIn PDF document text
    • http://apvn.info/userfiles/file/gugaxolojes.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/22c38b176fd8a4b7ab4ae1f79f6b31d4/67318739838.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b265be595---muvufevojemuredosexaw.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/soxup.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a82ea01c3---rexanazafe.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/6piiis4vbb12c5b191gcccfjc3/77353741514.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/75781934536.pdfIn PDF document text
    • http://anupbolivia.com/images/files/4234350617.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/54972969446.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210714012014.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c26b3bd08f609419e0dd6e8c0341e017/judowexilopajigarukotita.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b48da8aaf4---93732367431.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/woxezexurafejipetepu.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/86777714842.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d799c028bd---fefavuxijisekevesisotulil.pdfIn PDF document text
    • http://jaatkinson.com/userimages/86035352349.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/mulolor.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/20521684047.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/67159786744.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_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 10520 bytes
SHA-256: 0c54202f984d8227cc4bcb2d0d854be00fb7f3d004b875ec10bc1074eb320283
font_01_sfnt_off00010600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10600 17368 bytes
SHA-256: 7cd0fdf9136bdff752aac6829333cb6af8e6616939318d8e69f0b3acc6ea17b6
font_02_sfnt_off0001338c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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