Malicious PDF — malware analysis report

Static analysis result for SHA-256 874f9e59a8049958…

MALICIOUS

PDF

29.7 KB Created: 2020-04-21 14:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a4bc335ede62f8a8764bd356d8dcbb5d SHA-1: 99805b599a5ffca88fb91b2d9c5f42e31bcf41a9 SHA-256: 874f9e59a8049958f59005609e5691e50c097814e4504a7040963fb2364e62a8
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a link farm, with numerous external URLs embedded within the document body. The primary URL points to a page that also contains multiple links to other PDF files hosted on various domains. This suggests a campaign to drive traffic to a network of sites, potentially for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the extensive linking pattern is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://show-the-love.com/uploads/1/3/0/4/130476563/130476563.html#ecosystem+organization+worksheet+answers
    • http://successhrconsulting.com/uploads/1/3/1/4/131438556/miwafusavegata_wexudofavisiwe.pdf
    • http://yourrealestateadmin.com/uploads/1/3/0/3/130379132/ribilubif_nojogijazezija_takula_fenejuvabavemo.pdf
    • http://junbinow.org/uploads/1/3/0/3/130313507/durazobovexujo.pdf
    • http://writedsc.club/uploads/1/3/0/8/130814355/kemizewiduxakib.pdf
    • http://clclaredo.org/uploads/1/3/0/7/130738562/1759057.pdf
    • https://kidskonnect
    • 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_off00004ac2.bin
ec8bbaa80d449cb00ba92a7ea107c238446449c7b35fd8e3c6b22ef9a2a8a576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC2 7856 bytes

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