Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60b887b874bf29a…

MALICIOUS

PDF

71.4 KB Created: 2021-09-25 23:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 62faf99320536f16d329a8035786665b SHA-1: 772f37ce4da7aa616868a91fd84e31a7fea29b53 SHA-256: f60b887b874bf29a4c527633b07412b71026f1c57b9cef9e377ae592a38f5cc4
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are structured as link farms pointing to other PDF files, suggesting a phishing or malware distribution campaign. One prominent URL, 'https://infrive.ru/uplcv?utm_term=shadow+fight+2+mod+apk+level+52+max', indicates a lure related to game modification downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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.
  • 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://infrive.ru/uplcv?utm_term=shadow+fight+2+mod+apk+level+52+max PDF link annotation
    • https://hearing-outlet.com/uploads/files/202109150920591461.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/wubaxigut.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/13898822545.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210918225609.pdfIn PDF document text
    • http://www.nagsa.es/ckfinder/userfiles/files/70512700629.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/7730188567.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/tobabales.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/22820371165.pdfIn PDF document text
    • http://samarthservice.com/userfiles/file/vigejixipujubaguwadibax.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/af6a3d6579840da50772fb9d376cd615/45469171736.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161389c7ad6dc1---83719144181.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/86085880491.pdfIn PDF document text
    • http://stisk.com/file/diwobodubonagigi.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/lawivan.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/1561746605.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1630745954.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210914_055226.pdfIn PDF document text
    • http://stefani.cz/fck/file/vikumineda.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/55308680885.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/57266527639.pdfIn PDF document text
    • http://highlevel.pl/userfiles/file/figejexazaxamaxoma.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/65543264958.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/69a88a840db9d27ed40326214c977f63/67128275650.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/69181998738.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_off0000b394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB394 16132 bytes
SHA-256: ba8ac3c02ad4bb48b119717e2117195ac1d86007144df2db6a76a08af696bcd1
font_01_sfnt_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 11248 bytes
SHA-256: 650f2dc95ba9906ac29fbcf48c70d4ff9b7cd1d15b0fdc8bec03fdc0d58c34a0
font_02_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1