Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1fd199211743148…

MALICIOUS

PDF

49.4 KB Created: 2020-11-09 07:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 732df7e8f8552f4ebd9892a281a22565 SHA-1: 1767e412c1cc03ce1309d0b2bbcea1c389abfa0f SHA-256: b1fd199211743148c2a630eb1eb388dee637a90075abe250e1f9d4dca6f216d2
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM' that points to external PDFs. One of these external links, 'https://traffking.ru/123?keyword=yo+visite+ganimedes+pdf', is flagged as suspicious and likely serves as a lure for phishing or malware delivery. The document body also contains obfuscated text and URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 https://traffking.ru/123?keyword=yo+visite+ganimedes+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juzowilipi/zipapuxinitid.pdf
    • https://uploads.strikinglycdn.com/files/056daf45-fb37-40ae-87bd-48b52e322d3c/10067725721.pdf
    • https://s3.amazonaws.com/zasepo/59631040954.pdf
    • https://vawabuneje.files.wordpress.com/2020/11/butterfly_fly_away_sheet_music.pdf
    • https://s3.amazonaws.com/sixenogafopoj/wofukowobilanoxufeforaki.pdf
    • https://uploads.strikinglycdn.com/files/57a1f784-b36c-4b52-85bd-fe576e889094/paxejot.pdf
    • https://s3.amazonaws.com/mubefula/el_faro_jacksonville.pdf
    • https://uploads.strikinglycdn.com/files/b0f94da9-5dad-489b-8aef-3b0757e0f427/nunid.pdf
    • https://s3.amazonaws.com/wuniku/fundamentals_of_economics_book.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b94.bin
3c124167c55fade580bfcc884dd1a4f15ef43f46959f6bc02192c26d8991cbf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 5256 bytes
font_01_sfnt_off00007d70.bin
adfe1904ddc688d8856da7b0cda7f411da10311da37c4448819be8b621c53695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D70 10656 bytes
font_02_sfnt_off0000a252.bin
fe139538347d724e6b27dab22ead91fbb1eb3470a850438049392072e7f85921		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA252 16208 bytes

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