Malicious PDF — malware analysis report

Static analysis result for SHA-256 1466f26f32ae8290…

MALICIOUS

PDF

83.7 KB Created: 2021-09-18 19:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d409452a2f4cb62b496d62ff23537ea9 SHA-1: fb034dd7658d19b79d0bcf5589b723cfd40b8b03 SHA-256: 1466f26f32ae82907cdfbed052a1069d192f68e7660723a686ea87876042cf12
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple embedded URLs point to potentially compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous links and the nature of the hosting indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://showdetango.com/bafa/userfiles/file/71765440498.pdf In PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/91617774314.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/98137360725.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/219fa03c0157a34a7fc1d0deb97c47cf/21662831034.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614431ac42878---zizux.pdfIn PDF document text
    • http://liluby.com/upload/file/58738905985.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/komiwolakotezojuv.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/jetemovosipafududuk.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/roviwizukinit.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/gusimusogimesubu.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/didisivajopadisilofoxikim.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/72176881293.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/90062146564.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/bawesuvud.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/32422058293.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/26350230149.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/wosikupudiw.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/kofazipimof.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c700c1392---xelibofajugeliwoxukam.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64506562955.pdfIn PDF document text
    • http://benjapakee.net/UserFiles/File/37972334000.pdfIn PDF document text
    • http://apothepharma.com/upload/files/fabanevodajepefoxolumu.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/72887023319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=naruto+x+boruto+ninja+tribes+download+apkPDF 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_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 18616 bytes
SHA-256: 91ff8d9f3dab25202fc5abd3cbc44ddcec202838a032256fac42c310fa44ac86
font_01_sfnt_off00010f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8A 11012 bytes
SHA-256: 0787980653af3efa16aa39414ac7e2e4628fcc035085a5912abde85cd7327e7f
font_02_sfnt_off00012913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12913 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1