Malicious PDF — malware analysis report

Static analysis result for SHA-256 35018645ab0b1ad9…

MALICIOUS

PDF

44.2 KB Created: 2020-04-14 05:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 329e79e6eeaac3822ff77a70321cc8d3 SHA-1: 2b8a4bf4317842c74242af990a2ed2ddd7ec37cf SHA-256: 35018645ab0b1ad9eee0c7ab862fa544c5cdd8eca3017c652793fff802eaf0be
74 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier with high confidence as malicious. It contains multiple embedded URLs pointing to external resources, and a heuristic identified a social engineering lure related to browser extension installation. The document body, though heavily obfuscated, contains a reference to 'google play store app for android emulator' and one of the embedded URLs, which likely serves as the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://stopeurocide.com/uploads/1/3/0/6/130621278/130621278.html#google+play+store+app+for+android+emulator
    • http://cancercompanionpets.org/uploads/1/3/0/6/130620455/vatiximetilomak_xuradoxu_degabas_nuvotusipi.pdf
    • http://ryanmacedesign.com/uploads/1/3/0/6/130620202/4515488.pdf
    • http://progents.com/uploads/1/3/0/3/130323510/b0001900.pdf
    • http://dragonoxproductions.net/uploads/1/3/0/6/130621626/selegu-norujewofuzodo-jewidezotizoze.pdf
    • http://thenetworkclub.net/uploads/1/3/0/4/130491850/pejete.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_off000086bb.bin
546d8406ec9a9ce6280f218d5484e1b478327a01330d6ef5a98ead0b8362dc0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BB 7776 bytes

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