Malicious PDF — malware analysis report

Static analysis result for SHA-256 36dfe6669cd620fe…

MALICIOUS

PDF

37.7 KB Created: 2020-06-02 23:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c90cfcef5ef8df738c8ae46e2ada0e70 SHA-1: 4ffa60219f10875a48868a0da0aa86e039ce0b23 SHA-256: 36dfe6669cd620feb037a568bcd1a07a4315e1c024effcc70e63d4d06f0d69a7
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF links. The document body text, though partially obfuscated, includes a URL that appears to be a lure for 'Peliculas de antonio aguilar complet'. The presence of numerous external links suggests a link farm or redirection strategy to lead users to malicious content. No scripts were extracted from this sample.

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://valssalon.com/uploads/1/3/1/3/131379858/131379858.html#peliculas+de+antonio+aguilar+complet
    • http://mail.impactonetwork.org/uploads/1/3/1/3/131379085/9461155.pdf
    • http://ingersollsafecycling.ca/uploads/1/3/1/3/131384013/2386582.pdf
    • http://lccok.org/uploads/1/3/0/4/130483384/gokatazoze-fasalaxumi-zojamibivenuni.pdf
    • http://kylavender.com/uploads/1/3/0/4/130491703/guramapulokijufabeb.pdf
    • http://cpanel.craftyrice.com/uploads/1/3/0/8/130815140/donelovizabosigu.pdf
    • http://teachersforsocialjusticelv.com/uploads/1/3/1/6/131607440/zepajare.pdf
    • http://agairconditioningservices.org/uploads/1/3/0/5/130542769/32ab4cf87d.pdf
    • http://valssalon.com/uploads/1/3/1/3/131379858/terms.html
    • http://valssalon.com/uploads/1/3/1/3/131379858/dmca.html
    • http://valssalon.com/uploads/1/3/1/3/131379858/policy.html
    • https://mazewakipu.files.wordpress.com/2020/05/66249978949.pdf
    • https://fasogegof.files.wordpress.com/2020/05/jigoxapiguvejapozivegin.pdf
    • https://pinuraliwa9571753.files.wordpress.com/2020/05/3666699525.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_off00006842.bin
f39a191d875561dec8e4de951238ffec1598e4c50eabb6fe776e5763f27d09aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6842 10408 bytes

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