Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9f04d1afea7d68…

MALICIOUS

PDF

35.3 KB Created: 2020-04-03 04:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 95ecd3d795a7f8b5f3e4ca956ca9077a SHA-1: 2b5636654b71bf95818acfc400c3ffd178bc389d SHA-256: 0c9f04d1afea7d68baab7921d69c15699565272b98a1a3747ab8420eba5d8419
96 Risk Score

Malware Insights

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

The PDF document contains a deceptive title and a large number of embedded links to external PDF files, suggesting a link farm or a method to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs points towards a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself is used to host and link to potentially harmful content.

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://carnanelectricalservices.com/uploads/1/3/0/3/130379138/130379138.html#descargar+mortal+kombat+deception+para+ps2+iso+mega
    • http://hellothere2020.com/uploads/1/3/0/6/130620387/6027542.pdf
    • http://nwuu.org/uploads/1/3/0/4/130483737/bulibirozabixosu.pdf
    • http://kajoda.com/uploads/1/3/0/6/130604630/09f4c4103cbf.pdf
    • http://leahrosemusic.com/uploads/1/3/1/3/131380292/3339493.pdf
    • http://omahaadoption.com/uploads/1/3/0/9/130969294/rikajed_futujaropufo_fedevasogavewe_lanaba.pdf
    • http://townofgananoque.ca/uploads/1/3/0/7/130775763/8886174.pdf
    • http://coffeewithonions.com/uploads/1/3/0/5/130551257/a532c34375de.pdf
    • http://superminisource.com/uploads/1/3/1/1/131163601/9c2402b0883.pdf
    • http://kigglerplays.com/uploads/1/3/0/9/130969191/namaduri.pdf
    • http://yuleetreeservice.com/uploads/1/3/0/3/130312920/walolereluk-rizogix-mababexosij-nokilonudisuja.pdf
    • http://daverfortrumbull.com/uploads/1/3/0/7/130776349/03dd684.pdf
    • http://myahatraining.com/uploads/1/3/1/0/131070851/7822248.pdf
    • http://healingpractices.org/uploads/1/3/0/9/130969695/6cf45b728.pdf
    • http://jabv.org/uploads/1/3/0/5/130542780/1844315.pdf
    • http://healthyfed.org/uploads/1/3/0/8/130874635/fakopizidow.pdf
    • http://inspiredcreationsin.com/uploads/1/3/0/2/130288599/e7d7754.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_off00005e6b.bin
44dae4faf7e563398bb54f2100a0e733c39a672514799331fe0a7231d77d8934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6B 9184 bytes

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