Malicious PDF — malware analysis report

Static analysis result for SHA-256 6067ee9f51489d9d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 14:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a8443aa513708278b014feadbb0eb90b SHA-1: ef5aca29817427ca524baab26d628db03a9fcd45 SHA-256: 6067ee9f51489d9df6c5d01b279e211c87122192ed27aca1690783e911d246ae
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://wedding-box100.com/uploads/files/202109181919208874.pdf In PDF document text
    • http://nanoservice.cz/upload/file/80746799824.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613696bf1840e---doliratogoxodefeguf.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210916133026_175282405.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/giramo.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210905024523.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/kufuxodajonalam.pdfIn PDF document text
    • https://ottopianos.nl/files/20439054211.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/78901675182.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/getodirumugekup.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/13369598171.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/82902083627.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/77883358215.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/34257803705.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161408176e7fc0---27657377946.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/6c08f827a3d2d81fc6dddd32125e7761/kebuvefojopepajemopet.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/7554920823.pdfIn PDF document text
    • http://free-note.kr/files/fckeditor/file/9549208416133fe1232851.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/waxakutulovakavikonefuze.pdfIn PDF document text
    • http://pactolous.hu/upload/file/gavobarimilogopuzebix.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/sigesadenowa.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/98715090024.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/76386493305.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/gozasemowari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+send+gif+images+on+androidPDF 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_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 17452 bytes
SHA-256: 30728bbb03d2036e720871d08b211b5e2e4bf4490d2dc01f205af6b528ac32ff
font_01_sfnt_off0001093f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12156 10728 bytes
SHA-256: 37c6a680f99f44fef781d91d6fefab88d8c615c9969dad63e9e11f0363607e40