Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6b8a045c247e14c…

MALICIOUS

PDF

69.1 KB Created: 2021-09-25 18:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 93d1058f165066891ed4dc9e242ab699 SHA-1: 874fdafa5be4bd04b2fdf979027a7320f7d94c4a SHA-256: b6b8a045c247e14c151b600b3b5f2f17609dea90b545b334c6f661b47151dc89
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm, likely to host phishing pages or distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.examnotice.in/uploads/files/60469126250.pdf In PDF document text
    • http://ventss.ru/userfiles/files/10431095299.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/57162962978.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/43603185801.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/32247199584.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/49782147169.pdfIn PDF document text
    • http://szm.hu/userfiles/file/jomafogujemovitakude.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/22055320315.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/nesuwunapoduneredog.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/83281121734.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/jarexemimojorenurafiz.pdfIn PDF document text
    • http://chirineli.com/img/lib/file/83951596160.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/vufiwigiwigewe.pdfIn PDF document text
    • http://szybkieprawko.pl/szybkieprawko.pl/user/admin/fck/file/gadudafuzuziwatoribimawuj.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/85803368566.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/35966411618.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/14728102899.pdfIn PDF document text
    • https://linker.tw/files/66909230565.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/210437795.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/49011563924.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/82733713636.pdfIn PDF document text
    • http://retailcop.ca/files/kivurumarus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=adblock+add+on+chrome+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_off0000ada7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA7 16364 bytes
SHA-256: d7060ba2516f78e30b54f388aa28c06fdb433042ae55a9069af4f17f0adda416
font_01_sfnt_off0000d74f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74F 10584 bytes
SHA-256: 367b7362a495d870b2bb375f41a5ccad5fa37be4a771d99c2a60b71d349329e4
font_02_sfnt_off0000ef33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.