Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe48170b90549c69…

MALICIOUS

PDF

44.8 KB Created: 2020-03-30 02:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cf385cf5f6e7759d219c89d019ba5c4d SHA-1: 1a61af36b323ecfddc68418d036627df80ceaa84 SHA-256: fe48170b90549c69beaaf206de483fa49f31c775ba6115940df79049e3beda94
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to similarly structured URLs on various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further stages of an attack, such as phishing pages or malware downloads.

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://wcd-3ni9vm8.mgh-r.ch/uploads/1/3/0/4/130483368/130483368.html#plan+de+estudios+ciencias+naturales+sexto+grado
    • http://www.dandeanfinancial.com/uploads/1/3/0/7/130775400/3942892.pdf
    • http://pinkysgotpurses.com/uploads/1/3/0/7/130775570/9177625.pdf
    • http://sellonlinegarage.com/uploads/1/3/0/6/130622092/8150740.pdf
    • http://chestpaindoctor.com/uploads/1/3/0/6/130640051/8642359.pdf
    • http://lunaumbrawinery.com/uploads/1/3/0/7/130776525/lojagovuj.pdf
    • http://schoolofhospitalityireland.com/uploads/1/3/0/6/130620949/7538841.pdf
    • http://imareesbabies.shop/uploads/1/3/0/9/130969663/78edd99.pdf
    • http://foreverdreamflorida.com/uploads/1/3/1/4/131408791/zebogipuja_likitukuwikug.pdf
    • http://mindmapfraktl.com/uploads/1/3/0/5/130588461/rageriloduro-vusulawunil-durepuxen-buwipoto.pdf
    • http://buffybakery.com/uploads/1/3/0/7/130776889/3140477.pdf
    • http://millermediafilms.com/uploads/1/3/0/5/130590717/xumitinopekimeluvak.pdf
    • http://plazayouthcentre.com/uploads/1/3/0/3/130312983/8470290.pdf
    • http://peanutandmouse.com/uploads/1/3/0/8/130814340/4de428c36030f6e.pdf
    • http://reccomms.uk/uploads/1/3/0/6/130621895/da028.pdf
    • http://ancienthand.net/uploads/1/3/1/4/131437599/kavekizod.pdf
    • http://oddsandsudstavistock.com/uploads/1/3/0/6/130621485/pefil.pdf
    • http://74-123-75-252.mgwnet.com/uploads/1/3/1/3/131384660/5683504.pdf
    • http://earthandvinewine.com/uploads/1/3/0/6/130621503/bezitiziv.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_off00008383.bin
bd194aba462e8f8d71a5dbdb90b4bd971971c1a300a230c6cc464daa7b259da4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8383 9128 bytes

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