Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2f353f386f5b63…

MALICIOUS

PDF

37.5 KB Created: 2020-04-06 05:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bd4e49560682beab5fe05886b513654d SHA-1: edc331d0bc96d7fad77b7da0f572a99fd62d48d7 SHA-256: 4a2f353f386f5b63809eaea6a2d101d714e948bb05b61acd6b1a42e8ca497315
92 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 domains that appear to be part of a link farm. The ML classifier strongly indicated maliciousness. The document body contains text related to English grammar, likely a lure to disguise the malicious intent of the embedded links. The primary attack pattern involves directing users to external resources, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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
  • 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://engineeringjobsoverseas.com/uploads/1/3/0/2/130271051/130271051.html#oraciones+con+adverbios+que+modifican+al+adjetivo+en+ingles
    • http://urchig.com/uploads/1/3/1/3/131380908/294ed5fefbeeb.pdf
    • http://socohomephotography.com/uploads/1/3/0/2/130289630/xuzevifilokero-sexekogejilab-lujololutuvopi.pdf
    • http://dentlerdrywallandsupply.com/uploads/1/3/0/6/130604988/bapejewepan_bufinazeduvebe.pdf
    • http://anthony4local16.com/uploads/1/3/0/2/130289474/manofegepu.pdf
    • http://almudaifalawfirm.com/uploads/1/3/0/6/130620391/422098.pdf
    • http://lightoflifeassociation.org/uploads/1/3/0/9/130969565/674f9.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_off000064db.bin
799404b030242038e9eb0366145de20adfced81692a96af0ece2246f81f5e523		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DB 9496 bytes

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