Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3e3f486fc5fec1…

MALICIOUS

PDF

95.4 KB Created: 2021-09-17 04:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3d2c24f2a28b6699b3d0026d20a3c748 SHA-1: 8cdd1ac742930f0b5b1b991d5b037567949ad11a SHA-256: 9b3e3f486fc5fec117ad4355cd85b9770066546e6fcfa4e8d28b6882a0f6a48c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, indicating it is designed to lead the user to malicious content or download further payloads. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=fifty+shades+darker+full+movie+putlocker PDF link annotation
    • http://duquenne-moteurs.fr/webroot/upload/files/94697717963.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/fekulobibawemaxemorufekad.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090605214773499.pdfIn PDF document text
    • http://iccarrentals.com/files/file/bovivawujosebimab.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16140c5f125662---67705578999.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/mivuvunuwuzom.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/fomizezinajokisebed.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/sogotuxuguw.pdfIn PDF document text
    • https://kawanmto.net/contents/files/timogu.pdfIn PDF document text
    • https://megashina24.ru/files/files/voruzabizijijudegawigobo.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/fefewanesodimalonuzijas.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/fanulaxovemuxobafizinim.pdfIn PDF document text
    • https://bursac.net/userfiles/file/38854511630.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/74345873377.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/vubedabufegubetirikotegu.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/tiwipekubarabuwunorig.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/xopokedakitipexer.pdfIn PDF document text
    • http://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/bisiregapuzaxekobonu.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/wukifanukibogevawesum.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/44736155320.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/94291055375.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2971c94b130a11d1c2c77f2fb0789f3f/49545922413.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/joweniku.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/28758562077.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_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 19608 bytes
SHA-256: 273d5aefeb317b1d51b59d222bc4a86bd29c66c5de26b6f29f9945c4a49c0ed8
font_01_sfnt_off00013dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000155d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D2 11128 bytes
SHA-256: 1ed6bac8c803c87072f3da4d68612ca11a52bdfb1cd64474fb368776b2c7c921