Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ce66ff6327ee83…

MALICIOUS

PDF

69.9 KB Created: 2020-06-07 06:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c637bc3ca895e1a6590a0c67ea6fcf7 SHA-1: c17a8c38fcede39e38a2341461d55872d10a01e0 SHA-256: d2ce66ff6327ee83196224f532e821b2e4c9b43544d79ea6d317100ca14225fb
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm designed to host SEO-optimized PDF files. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie, likely intended to trick users into clicking through to a malicious site. The ML classifier strongly indicated maliciousness, supporting the presence of a link farm and potentially malicious content.

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://socialleadershipsolutions.com/uploads/1/3/0/5/130550914/130550914.html#Full+metal+chaqueta+pel%25C3%25ADcula+en+l%25C3%25ADne
    • http://luminouswater.us/uploads/1/3/0/5/130539843/fitero_kekurimamotuluk_pukewomilabisu.pdf
    • http://vkunlimited.com/uploads/1/3/0/2/130289259/1614008.pdf
    • http://americanexteriorsfencing.com/uploads/1/3/1/8/131856570/zefazamujokalow_timudufinegil.pdf
    • http://armeniangroceries.com/uploads/1/3/1/3/131380977/b6257bccf.pdf
    • https://zujidifowuro.files.wordpress.com/2020/06/71096086589.pdf
    • https://kimetaduwun.files.wordpress.com/2020/06/gugifeb.pdf
    • https://ronezas.files.wordpress.com/2020/06/27942836951.pdf
    • https://bamidepe.files.wordpress.com/2020/06/mitebesimujufuxokexola.pdf
    • https://dopotoma348431311.files.wordpress.com/2020/06/76110645220.pdf
    • https://zaxuxemewasa.files.wordpress.com/2020/06/nubuluriroxuviwulupa.pdf
    • https://konivopuwu.files.wordpress.com/2020/06/gagulibenugafubifawow.pdf
    • https://retilutegif.files.wordpress.com/2020/06/lovevi.pdf
    • https://kurupava.files.wordpress.com/2020/06/wuwuxonepafikemuxobaba.pdf
    • https://bisoliwabogu.files.wordpress.com/2020/06/8043159226.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_off0000e168.bin
d59ba21a83fc7771735b97a2bd999447c91f57a7b6e6f2c13a3aacbfc9a8f9c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 11876 bytes

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