Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2df162b72ff8992…

MALICIOUS

PDF

42.9 KB Created: 2020-04-05 12:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 8a89c8eb30bbe805a3eedb2e831e879b SHA-1: d26cefa1d50b8f1564d59e867f64ac5c5c5facb3 SHA-256: e2df162b72ff89921cab28719c2d0cdb1a815873b06966b311dff75bbfbe553a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The embedded URLs and the document body text, though partially garbled, contain references to these external resources. No scripts were extracted from this sample, but the sheer volume of outbound links is highly suspicious and indicative of malicious intent, likely to drive traffic or distribute further malware.

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://yaredimmtratax.com/uploads/1/3/0/6/130604162/130604162.html#consultas+de+seleccion+access+2016 PDF link annotation
    • http://carebydog.com/uploads/1/3/0/6/130621477/takewofixepomudeto.pdfIn PDF document text
    • http://teamop.se/uploads/1/3/0/6/130620282/ff7041dee54.pdfIn PDF document text
    • http://fishytushy.net/uploads/1/3/0/2/130272963/64046e9c8.pdfIn PDF document text
    • http://mbkdallas.org/uploads/1/3/0/5/130539992/ae7ae5.pdfIn PDF document text
    • http://mindysjourney.org/uploads/1/3/0/2/130288394/zuwodawuzo-newumud-vuruw.pdfIn PDF document text
    • http://peppersthailand.com/uploads/1/3/0/6/130604641/wuvodubikoba-kigujukuwabovet-tezuf.pdfIn PDF document text
    • http://insideanonlinegame.com/uploads/1/3/0/6/130604808/c1eaa96c55cd7d6.pdfIn PDF document text
    • http://cliniqueeducosante.com/uploads/1/3/0/9/130969054/fagololorof_vazadiro.pdfIn PDF document text
    • http://fourseasonsenterprise.net/uploads/1/3/0/7/130739224/922453.pdfIn PDF document text
    • http://westernwarriors.org/uploads/1/3/0/2/130288854/623e51ea2fe01.pdfIn PDF document text
    • http://suzygrimshaw.com/uploads/1/3/0/8/130873957/9896526.pdfIn PDF document text
    • http://growingingracedaily.com/uploads/1/3/0/5/130551253/mubum_nijepuza_pupixumupukek_tometudexarujel.pdfIn PDF document text
    • http://redandrio.com/uploads/1/3/0/8/130874307/a7c46783.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
🗂 Part of campaign: mindysjourney.org 3 samples

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5A 8320 bytes
SHA-256: 23a709d05715972a851c13973b19c68d1a1197ff638b292a607acbba2d2fe192