Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2f2df86ab6f0a2…

MALICIOUS

PDF

38.9 KB Created: 2020-03-30 23:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fa2d71aadcdf8e10ef6a0519ad341df9 SHA-1: d12021903f0fbcf2bb2335cd8a49a8d943d06040 SHA-256: 6e2f2df86ab6f0a212dcf5f42e0c88ef1752e4633ec874ba38cb2d765febb367
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as a lure or a distribution point for further payloads.

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://theleawoodfamilydentist.com/uploads/1/3/0/5/130544539/130544539.html#figuras+geometricas+para+armar+prisma+hexagonal
    • http://devtwenty.com/uploads/1/3/0/7/130776138/4f1bcfcc7ec5113.pdf
    • http://alevelapps.com/uploads/1/3/0/6/130621321/rowunuvere.pdf
    • http://basicbalance.net/uploads/1/3/0/8/130815031/182205.pdf
    • http://wonderofus.com/uploads/1/3/0/2/130289154/948a0e4751188e.pdf
    • http://riodellretreat.com/uploads/1/3/0/4/130489627/vudotipow-xuwudazi-delebaripe-fuzedido.pdf
    • http://mixingupminecraft.com/uploads/1/3/0/4/130476351/9046674.pdf
    • http://novymedical.com/uploads/1/3/0/5/130539241/tebupuli.pdf
    • http://newcanaandems.org/uploads/1/3/0/7/130739720/gejobubadivati.pdf
    • http://priyabery.com/uploads/1/3/0/9/130969059/kolaguputizefiwupe.pdf
    • http://cv-cc.com/uploads/1/3/0/7/130776157/9191748.pdf
    • http://cowboys4heroes.org/uploads/1/3/0/9/130969895/7cc62f45fbc.pdf
    • http://mypetebuttigieg.com/uploads/1/3/0/4/130476513/kejuwozi.pdf
    • http://invisible-museum.org/uploads/1/3/1/3/131379729/67bf4a41.pdf
    • http://androidmag.com/uploads/1/3/1/1/131163578/debogakigabidevejeza.pdf
    • http://zombiexone.com/uploads/1/3/0/6/130639412/7833667.pdf
    • http://pakpashtoon.com/uploads/1/3/0/5/130589010/058b8927c.pdf
    • http://saferidertips.com/uploads/1/3/0/6/130639845/a7b0c4c8c1e89.pdf
    • http://sheffieldscienceinpolicy.com/uploads/1/3/1/4/131438244/5537270.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_off00006d32.bin
dcbd445118af6fcdaef5a38810dfda3934002fb614311c85ca2eafa0d9f80ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D32 8524 bytes

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