Malicious PDF — malware analysis report

Static analysis result for SHA-256 7755377576660691…

MALICIOUS

PDF

36.5 KB Created: 2020-05-19 22:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 659b9b0046720fccee32d585c1393d01 SHA-1: 05719b7738762cb44a740877a0856c343c5b8508 SHA-256: 7755377576660691f10595c6abd3e74b55efee0b6119c7f51d9b1ef9eabc87c6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs likely lead to further malicious content or phishing pages.

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://lancasterec.com/uploads/1/3/0/3/130313213/130313213.html#samsung+hw-k360+2.1+wireless+sound+bar+review
    • http://khmediation.com/uploads/1/3/0/5/130589217/mijivifunetizo.pdf
    • http://kwkeytech.com/uploads/1/3/1/3/131379555/nasulaj.pdf
    • http://inleewetrust.xyz/uploads/1/3/1/3/131381489/27c05534e3.pdf
    • http://lionsgatedairy.com/uploads/1/3/1/8/131857734/7064761.pdf
    • http://cdiviaq.com/uploads/1/3/0/6/130604574/pomubinonulufafe.pdf
    • http://roes-legal.com/uploads/1/3/0/4/130476940/2abb760c52324cc.pdf
    • http://affiliatesearncash.com/uploads/1/3/0/9/130969182/2224608.pdf
    • http://tkdevelopers.net/uploads/1/3/0/8/130814863/8855503.pdf
    • http://cornerstoneauto.info/uploads/1/3/0/7/130775866/sakekuzazijupaduno.pdf
    • http://dreamgridstudios.com/uploads/1/3/1/8/131858540/busefesite.pdf
    • http://votened.net/uploads/1/3/0/6/130640219/76f4e87.pdf
    • http://stephenbrunson.com/uploads/1/3/0/8/130874569/jegeg.pdf
    • http://jttechsolutions.net/uploads/1/3/0/2/130287977/gapijovigubaz-sotibafami.pdf
    • http://bluebirchdesign.com/uploads/1/3/0/6/130605104/7455839.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063cf.bin
a597c02bfe3d85cc2267c21ca4535cad5ec413746f9bc8e8fb062437416e228c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CF 10212 bytes

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