Malicious PDF — malware analysis report

Static analysis result for SHA-256 6662cac28bd0dc80…

MALICIOUS

PDF

44.0 KB Created: 2020-03-28 06:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d34a4d9eac294e092fba3ec1459cd709 SHA-1: 8ecb71b4271ea9d2127f492b3b9357cf41d6bd16 SHA-256: 6662cac28bd0dc80fd3862cc60822f83d14565cfc2bf68d6585636669aa36ff0
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to potentially malicious content or engage in SEO spamming. The document body itself is heavily obfuscated and contains garbled text along with some URLs.

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://dasbikehaus.com/uploads/1/3/0/5/130550756/130550756.html#principales+caracteristicas+de+la+arquitectura+del+renacimiento
    • http://diradevelopments.com/uploads/1/3/0/4/130475928/7286549.pdf
    • http://hostmaster.julianheritage.co.uk/uploads/1/3/0/9/130969375/mopuruzemu.pdf
    • http://chaffhayenj.com/uploads/1/3/0/8/130813453/fesif.pdf
    • http://troop12nc.com/uploads/1/3/0/7/130738796/jijiwuvegoduwaju.pdf
    • http://edxgraphics.com/uploads/1/3/0/6/130639175/9458551.pdf
    • http://daafadvies.nl/uploads/1/3/0/2/130287488/1796386.pdf
    • http://www.successawaitsteam.com/uploads/1/3/0/5/130590525/riwemo_pasenobag.pdf
    • http://rhonakamar.com/uploads/1/3/0/5/130550898/4292896.pdf
    • http://baarleproeft.com/uploads/1/3/0/4/130483830/41abb8ce56f.pdf
    • http://jso.tn.org/uploads/1/3/0/6/130621349/vuwekesor.pdf
    • http://mail.wieczorkowscy.com/uploads/1/3/0/4/130435783/04001995986fc74.pdf
    • http://videofam.com/uploads/1/3/0/6/130640105/zakim.pdf
    • http://supermario.tracymedeiros.com/uploads/1/3/0/5/130539338/wagafax.pdf
    • http://myforeclosurelawyer.net/uploads/1/3/0/6/130604320/72c703.pdf
    • http://masseygavin.com/uploads/1/3/0/4/130491008/gozevujexunanor.pdf
    • http://www.cjspartyrental.com/uploads/1/3/0/5/130545194/zalizoxosipowo_nigoxoduwojo_biwarevigom.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_off00008011.bin
f463e762d0064efa02aaca66b6a4f7d92a1eaae274b2256680e88df3202f8182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 8844 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.