Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fb2bd2c7f3471b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-21 08:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5c873d9a100a1db8d17123c5c3430612 SHA-1: 08fdd8cb126978d4251172fb39c853c1e913a76a SHA-256: c6fb2bd2c7f3471b189fa1e2ee0324d4a161e28d330e33b0f4d312ddf0ede450
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs, potentially for phishing or to download a second-stage payload.

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
  • 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 https://namratalakhotia.com/userfiles/files/42781208158.pdf In PDF document text
    • https://daaeportrett.no/upload/file/fitowunalizelubukalozud.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/28271708960.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/16503991245.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/57316735688.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///80060003336.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/24760769616.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/cfbb9a33357d948b6cf12a01f06e47bf/vumelofugamisebokogure.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/rugarakaveruzinitemaxowe.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/sekisekaxekomabopemaxe.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///zosimesixa.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/forowetatovixowetavabiju.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///86340256694.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/zemokabomewifamu.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/motelepu.pdfIn PDF document text
    • https://ntc-container.com/upload/files/34231660239.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/94092996603.pdfIn PDF document text
    • http://wernitznigg.at/files/73940262219.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/safolusifoxibofizarexifaf.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210903074922.pdfIn PDF document text
    • https://senfina.top/uploads/files/vanexukigideganasone.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/20081097255.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/mokavawefonusog.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/73726194959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=monster+hunter+movie+download+480pPDF 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_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 11312 bytes
SHA-256: b356a2f753cd76abc5e9ebbc5981f330dd4c0da8e97f7bfb109786f7a9830ea3
font_01_sfnt_off0000f7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE4 18048 bytes
SHA-256: 57ef4290b8a59db3ec0acef3ce20eec522bb50c79ac2b7bbdd53cc175a725137