Malicious PDF — malware analysis report

Static analysis result for SHA-256 4810f4fb03c32063…

MALICIOUS

PDF

40.9 KB Created: 2020-03-17 05:41:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 22fcb07eac7a37d16651780d62cd892c SHA-1: ce82b3c832a27b00e1ea5da0a530587959783443 SHA-256: 4810f4fb03c32063fa47528cd30a3e33c0aff6c0a80dd5fa10c87e17f9af1a2b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains a URL that matches one of the extracted links. This suggests the primary purpose is to redirect users to a network of other websites, likely for malicious SEO or to host further malicious content.

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://djsacademy.com/uploads/1/3/0/6/130639477/130639477.html#como+hacer+una+maqueta+de+un+puente+colgante+facil+paso+a+paso
    • http://the-divine-alignment.com/uploads/1/3/0/6/130604955/a48e25ea5d2.pdf
    • http://lagniappewithahook.com/uploads/1/3/0/6/130621673/zekegukut-fapejiz-fubupox-kenazarimurewe.pdf
    • http://www.shindigshop.ca/uploads/1/3/0/6/130621583/19f896b0490.pdf
    • http://autodiscover.ivesart.com/uploads/1/3/0/6/130621973/32de85.pdf
    • http://travelmusiccity.com/uploads/1/3/0/5/130588773/1334494.pdf
    • http://sqftestwo.com/uploads/1/3/0/7/130776592/7630145.pdf
    • http://childsupporthelpaustralia.org/uploads/1/3/0/5/130588789/5421662.pdf
    • http://meetonhorn.com/uploads/1/3/0/6/130620484/jiwupilofuli-wipobaril-paruzu-sefolajale.pdf
    • http://adventistseniorguide.org/uploads/1/3/0/5/130550838/8760663.pdf
    • http://4n0.com/uploads/1/3/0/5/130544889/7588931.pdf
    • http://marshalinehan.com/uploads/1/3/0/5/130551179/xerinukeriw-kudepi.pdf
    • http://lightwavewellness.com/uploads/1/3/0/4/130476974/36a459d9fd6d51.pdf
    • http://mylabeau.com/uploads/1/3/0/6/130604902/3bd3c9be1fe4e8.pdf
    • http://okellyandruby.com/uploads/1/3/0/5/130590339/xuxasajelezita.pdf
    • http://mypefun.com/uploads/1/3/0/5/130551341/203006d564eb33.pdf
    • http://no-naturopaths.org/uploads/1/3/0/6/130621772/xidaxegogazaka_vujatutubisi.pdf
    • http://www.shushu.us/uploads/1/3/0/6/130621950/mefavutavuzaxux.pdf
    • http://alcoalandopportunity.com/uploads/1/3/0/5/130551505/1333800.pdf
    • http://creativeairflow.org/uploads/1/3/0/6/130603891/peledoro.pdf
    • http://nannymoscow.com/uploads/1/3/0/2/130272513/e52fdea4afcc.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_off00007550.bin
a61d2fd7ea13994fa83f43b4e500400216187ea7b02ddb441cfdacaf5314dd99
pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 8268 bytes