Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90903b4d12fbc91…

MALICIOUS

PDF

41.9 KB Created: 2020-04-13 07:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c33e60d0e95e3fa7f0d519437c63b7ee SHA-1: 62cf1e8ad45a72adeb1280791dbe78010a6aab3a SHA-256: c90903b4d12fbc9168e4d2ad14df3d7f568fca61eab3e7800c35a368808d7b16
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, a technique commonly used for SEO poisoning or to redirect users to malicious websites. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that points to a potential phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://teshuvah.international/uploads/1/3/0/8/130874139/130874139.html#planos+de+parques+urbanos+dwg
    • http://viviannixon.net/uploads/1/3/1/4/131453278/judonatudevozol.pdf
    • http://realfastservices.com/uploads/1/3/1/4/131483465/sesipofel-sazuxonivuw.pdf
    • http://bacdugi.com/uploads/1/3/0/6/130604979/1b7bd72df.pdf
    • http://clientcareportal.com/uploads/1/3/0/5/130543546/f0e877.pdf
    • http://ngenx.org/uploads/1/3/0/6/130604539/3610733.pdf
    • http://absolutrvrepair.com/uploads/1/3/0/3/130379921/jedinuxilatifaj_bizosoravon_wunuvas.pdf
    • http://actingwithcompassionandtruth.org/uploads/1/3/0/6/130639980/06a730cc.pdf
    • http://candyvorecreative.net/uploads/1/3/0/4/130476740/9bba72a0eb.pdf
    • http://cakeballstogo.com/uploads/1/3/1/4/131409210/xifazanowi-fosebesoxibixu-zozusebekomo.pdf
    • http://armscointernational.com/uploads/1/3/1/3/131380342/taxafuke.pdf
    • http://primecustomer.org/uploads/1/3/1/3/131384567/dovenuvijisareban.pdf
    • http://reddirtrubs.com/uploads/1/3/0/7/130776065/fewugitazetaxi.pdf
    • http://kisocloud.com/uploads/1/3/0/4/130476389/tiget_pisin.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_off000078d0.bin
8fa7a63d0e2dc7f2a3e7a9a273d1aefd77fe6d441186efe8a2dee2c7362a9809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D0 9280 bytes

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