Malicious PDF — malware analysis report

Static analysis result for SHA-256 863cb185a9e6a50c…

MALICIOUS

PDF

37.2 KB Created: 2020-03-06 16:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1d459c1a1f54fbe4abd1ac3821a48374 SHA-1: 5ba0bb5f2700c697354b3167ff6afec3731e52f6 SHA-256: 863cb185a9e6a50c8e26372b0b601ef9932952d2167b1702c907c9ad427759e9
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely serving as lures or download locations 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://host17.carmichaelnl.com/uploads/1/3/0/6/130605108/130605108.html#guitar+nick+fingerstyle+blues
    • http://sousvideacademy.com/uploads/1/3/0/5/130540882/18eb7b08fd8597.pdf
    • http://mmarieboutique.com/uploads/1/3/0/5/130588620/lapum.pdf
    • http://phaseiesa.com/uploads/1/3/0/3/130313183/motemitemeli-ragilito-romonop-sakipeto.pdf
    • http://codemonster.com/uploads/1/3/0/7/130738936/rutepu.pdf
    • http://safealert.com/uploads/1/3/0/7/130776363/7036311.pdf
    • http://domainkey.safetyfactor.com/uploads/1/3/0/6/130620929/315504.pdf
    • http://nati-artist.com/uploads/1/3/0/5/130551287/soxejelabivemuf.pdf
    • http://quadgear.org/uploads/1/3/0/3/130313836/joxemarevejazixef.pdf
    • http://mgcfestivalcom.com/uploads/1/3/0/9/130969281/9247429.pdf
    • http://catrapsheet.com/uploads/1/3/0/2/130291975/2968388.pdf
    • http://wholehealthprojecteastside.com/uploads/1/3/0/5/130538839/varogopu.pdf
    • http://people4politics.com/uploads/1/3/0/6/130639436/sudozaz.pdf
    • http://www.jasminelvazquez.com/uploads/1/3/0/4/130483429/wufixilajazobebupexu.pdf
    • http://emerdello.com/uploads/1/3/0/2/130288542/bepifenedasew_tiramitimimesa_vanekunixo_saxunilimex.pdf
    • http://interstellarbrands.com/uploads/1/3/0/6/130604869/97f23aa5ac27a6.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_off000069d6.bin
afc05540b33ab91961f3cc9247a528752cb398f915efde79e0d9ed754c410c34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D6 7612 bytes

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