Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d60b5c2865c57a5…

MALICIOUS

PDF

79.9 KB Created: 2021-09-20 06:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4dcb23d29d38afafcdc3ed116f83441d SHA-1: 60471a40677e6200973871cf1d43881a965360d3 SHA-256: 4d60b5c2865c57a5f0816f1031f561147ceb8b0a372a8f953d9f6edc2ac400da
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The presence of numerous external URIs, many pointing to link farms on disposable hosting, strongly suggests a phishing or credential harvesting campaign. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=xiaomi+redmi+note+9+pro+camera+problem PDF link annotation
    • http://myepres.com/HotelEstimator/userfiles/file/mewuviko.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/lamidezokisiwitosi.pdfIn PDF document text
    • https://vcubusinesssolutions.com/userfiles/file/11923474303.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/6524366879.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/fabofivumo.pdfIn PDF document text
    • http://schturman.ru/files/files/lanodikizepomawa.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161361cc457342---minowefikukowewidovise.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/xanuvudove.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61741426176.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/587915396.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/72030819747.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/16920857592.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/24970756258.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/23585321212.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/bufokotij.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210907151732.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/3cd25bd4f22ad28f2947c85a9484d16e/4247478.pdfIn PDF document text
    • https://gkatsov.com/userfiles/file/befajobav.pdfIn PDF document text
    • https://gryf-wet.pl/ckfinder/userfiles/files/munugudo.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/pesitomokufegarese.pdfIn PDF document text
    • http://charivne.info/images/file/29593253389.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/47571588707.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/wuxavujefebu.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/29909291301.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_off0000d38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38E 17668 bytes
SHA-256: c74fcfe43ce4d7f07677a67ddf7febb194644edc66bd84705adab4607864c248
font_01_sfnt_off000101a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 10820 bytes
SHA-256: df4d45192b75bf08a311e03930821c83c5835ce8de5f4b84465f9f6c2d0c43c5

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