Malicious PDF — malware analysis report

Static analysis result for SHA-256 60181cbf64e25a35…

MALICIOUS

PDF

69.7 KB Created: 2021-09-13 18:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1ec5993388c79593e0cecd14c7b6bb6f SHA-1: 50c8d0e34949d23596566e7f12ddbede6ac57a18 SHA-256: 60181cbf64e25a35e5d08a76edbf10b712303bed836f4f56902c3de8ebf1c3d7
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malicious redirection attempt. The presence of a Google feed proxy URL with a 'granny game download' query parameter indicates a lure to trick users into downloading potentially malicious content. While no scripts were directly extracted, the ML classifier strongly flagged this PDF as malicious, and the overall structure points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • 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 http://www.tsahimmongol.com/uploads/images/files/semulipuresudozut.pdf In PDF document text
    • http://globalfeedindustry.com/upload/files/nipalexujujekuxitenusuv.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/4760596024.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/xawata.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/davapelumud.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/vemum.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/79727200168.pdfIn PDF document text
    • http://zenithmetals.com/files/94737561089.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/sunabapikob.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/pafukabodubobobuba.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///48464136965.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/85352840265.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/69396305573.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2543a33e9a29371ae260be28a8412508/89585397777.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109062038178803.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/vonapaluluwidir.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/totiku.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/3974629280.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/62365997051.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/darajajugevesab.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/12737186728.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=granny+game+download+for+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_off0000b252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB252 10672 bytes
SHA-256: 33b0ae4bb8a3e728853fe86f2f5def4082c15d6076a74971860b96eda4cf492b
font_01_sfnt_off0000ca99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA99 15276 bytes
SHA-256: 005550318437e250125c9952b71e82393e3402db63328fa9f92fc387a1db7657
font_02_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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