Malicious PDF — malware analysis report

Static analysis result for SHA-256 177cdc5472580bf3…

MALICIOUS

PDF

37.4 KB Created: 2020-03-29 02:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5af92745abbe6d9c6ea72f4e1dbc0ae9 SHA-1: 5d3422965f0404772c5438ed999536be8786e60c SHA-256: 177cdc5472580bf31eace56a6b50922579e4fac54d73620f1f924d5c05e320b8
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to PDF files hosted on various domains. The document body text, though partially corrupted, includes a reference to 'Procedimiento almacenado de insertar en sql' and embedded URLs, suggesting a lure to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely involving redirection to phishing or malware distribution sites.

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://74-123-73-235.mgwnet.com/uploads/1/3/0/8/130813903/130813903.html#procedimiento+almacenado+de+insertar+en+sql
    • http://lavendula.org/uploads/1/3/0/7/130739254/ca0164.pdf
    • http://aquariusfunding.com/uploads/1/3/0/3/130323633/fababuxusa.pdf
    • http://topabudhabi.com/uploads/1/3/0/6/130621214/tobag.pdf
    • http://kandjmechanical.info/uploads/1/3/0/4/130488338/ce0e5b252bfc2b.pdf
    • http://frontlinefordogs.net/uploads/1/3/0/5/130551981/kurazalipidovafuku.pdf
    • http://oxoacademy.com/uploads/1/3/0/7/130739828/7444195.pdf
    • http://starsandstripesexpress.info/uploads/1/3/0/2/130292089/nifigejomiva-tizekeni-kejipadopodure-rubog.pdf
    • http://wesleyoverwindsor.com/uploads/1/3/0/2/130271116/zujuduwol.pdf
    • http://brittnimehlhoff.com/uploads/1/3/0/5/130541688/xajepakup_nivewoledit_paxupu.pdf
    • http://anewayteachingconsultant.com/uploads/1/3/0/2/130288394/3483116.pdf
    • http://thisweeksbestdeals.com/uploads/1/3/0/2/130272930/fumakovaviku.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_off00006471.bin
ee1ac77080f57e867855f601434630d59be8728e973b101d5c0bebfe8169a51d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6471 9456 bytes

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