Malicious PDF — malware analysis report

Static analysis result for SHA-256 2655f8ca2d8ab69d…

MALICIOUS

PDF

70.8 KB Created: 2020-03-28 08:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e0a71175c6b4a6704e362c25536f907a SHA-1: 60a798576c7451fe8f1b37785f87f652acf51bc0 SHA-256: 2655f8ca2d8ab69d779846ddad1707c3e541f4360e4f1d2691f88fc24826262b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links to external PDF files, a common technique for SEO spam or phishing. The document body, though heavily obfuscated, contains a reference to 'Keystone rv owners manual' and a URL that appears to be a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The primary attack pattern involves redirecting users to malicious content via embedded links.

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://zephyrhome.com/uploads/1/3/1/4/131405956/131405956.html#keystone+rv+owners+manual
    • http://dirafoundation.com/uploads/1/3/0/5/130541803/fizopolezobixokupim.pdf
    • http://carrenotravel.com/uploads/1/3/0/6/130620715/7287ea126a3117c.pdf
    • http://essentialpleasure.com/uploads/1/3/0/5/130588948/wasujil_xupezegidi_pokobux.pdf
    • http://innovativesportfans.net/uploads/1/3/0/5/130551154/kuwikekevo.pdf
    • http://mjbprolightsandsounds.com/uploads/1/3/0/5/130590508/romujikujufarof.pdf
    • http://m2d-design-interieur.com/uploads/1/3/0/8/130814258/dd93693f51.pdf
    • http://pablo-k.com/uploads/1/3/0/6/130604779/walugoseb-duwomibal.pdf
    • http://christmasinchilhowie.com/uploads/1/3/0/5/130543488/4668860.pdf
    • http://www.southerngirlthings.com/uploads/1/3/0/6/130639500/tixuwidowob.pdf
    • http://shesroyaltee.com/uploads/1/3/0/6/130621581/tavitexukemavo.pdf
    • http://valuegun.com/uploads/1/3/1/3/131379421/679d64bb2.pdf
    • http://thedustybunch.com/uploads/1/3/0/2/130272619/8120691.pdf
    • http://fulloflifeartistry.com/uploads/1/3/0/5/130589250/8518072.pdf
    • http://littleriverpcs.com/uploads/1/3/0/5/130545096/655733.pdf
    • http://designslgt.com/uploads/1/3/0/5/130590658/2629820.pdf
    • http://delhiescortservice.agency/uploads/1/3/0/7/130739934/b9b179ef9.pdf
    • http://legalshieldassociates.biz/uploads/1/3/0/4/130483429/4f87cc537d60d.pdf
    • http://mdtechcomputer.com/uploads/1/3/0/5/130588295/884969.pdf
    • http://simplycorkie.com/uploads/1/3/0/2/130289724/rodojupatu.pdf
    • http://drkellieemrich.com/uploads/1/3/0/3/130379528/nifidibuxo.pdf
    • http://vferme.net/uploads/1/3/0/9/130968933/peruvuw.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_off0000ead1.bin
a3286ddbccf319f6748452fcc7ba93a3d876af0bca1ca3cbb503029bce8580bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 9024 bytes

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