Malicious PDF — malware analysis report

Static analysis result for SHA-256 778c2523d339bc33…

MALICIOUS

PDF

41.4 KB Created: 2020-03-23 04:38:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5a7ae14a4060d2d5ef2d01609fd4f044 SHA-1: 78e22af85dcb272bdf5c78c924bdf30692e162ce SHA-256: 778c2523d339bc33959d5ac4c66a3a5c574028c571d0b63b0eeeef0f459730c9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious.

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 http://dancinggoatsanctuary.com/uploads/1/3/1/0/131070488/131070488.html#ciudades+mas+importantes+de+mexico+economicamente+2017
    • http://simi-art.com/uploads/1/3/0/5/130588291/remebib_dojemesituxab.pdf
    • http://savannahceramics.com/uploads/1/3/0/5/130588939/605dbe.pdf
    • http://gamesmalta.com/uploads/1/3/0/8/130814933/c0bd4d.pdf
    • http://www.americanropehorsefuturity.com/uploads/1/3/0/5/130540049/bagamejov-zojaburemowe.pdf
    • http://cpanel.webcard.online/uploads/1/3/0/4/130476650/2d1044883178ce4.pdf
    • http://ravaflav.net/uploads/1/3/0/5/130551266/4e476d523ca.pdf
    • http://www.tradvisory.com/uploads/1/3/0/6/130603741/9854400.pdf
    • http://www.fireflygraphics.us/uploads/1/3/0/9/130969469/4982436.pdf
    • http://www.notthaticonic.com/uploads/1/3/0/4/130477036/tilitoroximupowi.pdf
    • http://ibtrios.com/uploads/1/3/0/2/130271030/348142.pdf
    • http://www.robertestupinian.info/uploads/1/3/0/6/130604938/mukugorekaxuzeb_xizabofe.pdf
    • http://convenientdeals.org/uploads/1/3/0/4/130435998/2296664.pdf
    • http://oilsfortriathletes.com/uploads/1/3/0/4/130476145/sesadumelasofinatoj.pdf
    • http://hafdishanna.org/uploads/1/3/0/4/130488736/5959390.pdf
    • http://tonypandytaxiservices.com/uploads/1/3/0/7/130740110/8157360.pdf
    • http://pleaseexcusetheshirt.com/uploads/1/3/0/5/130589322/3468107.pdf
    • http://iphonephotoclub.com/uploads/1/3/0/6/130603994/700ded887.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_off000073c7.bin
6a79ecb3d01d38d916686ed663d0b07a591d9c0f782b20f101b58f08e684a6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 9544 bytes

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