Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6036c25673e92a…

MALICIOUS

PDF

34.7 KB Created: 2020-06-10 15:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f715e19468408eb522310c0f70be9055 SHA-1: 888d68d1a67fa9d475a2fcebbaf678ebf63ee797 SHA-256: 7d6036c25673e92a7fc0f6a6bf689c0389b5009ae60fdb0d23512ebece55091b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, suggests a lure related to an invoice ('Facture d' avoir exercice corrigé'). The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kinkiosk.com/uploads/1/3/1/3/131384281/131384281.html#facture+d%2527+avoir+exercice+corrig%25C3%25A9
    • http://dazzlingexpressions.net/uploads/1/3/0/7/130738501/7303488.pdf
    • http://dfs-tech.net/uploads/1/3/0/2/130271011/6702925.pdf
    • http://medicalwhitepapers.com/uploads/1/3/0/9/130969316/1178043.pdf
    • https://karawalugut.files.wordpress.com/2020/06/jutoxumarewuzipuramasok.pdf
    • https://nirakopifaz.files.wordpress.com/2020/06/zudafi.pdf
    • https://xadixijep.files.wordpress.com/2020/06/ziwokumexawuvalifinixoj.pdf
    • https://rudagus.files.wordpress.com/2020/06/zunalafijiwopabop.pdf
    • https://sifuloli.files.wordpress.com/2020/06/35473568030.pdf
    • https://rekinirive.files.wordpress.com/2020/06/595843594.pdf
    • https://kuvimuzatep.files.wordpress.com/2020/06/13376867892.pdf
    • https://piwunis.files.wordpress.com/2020/06/lemijolijetofas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a10.bin
cb731360c1edca5a8eedc027baef724e75c81554a57ce18a22061bd23ba31574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A10 11052 bytes

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