Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fee87ac7ae7bd1e…

MALICIOUS

PDF

38.5 KB Created: 2020-03-19 04:21:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eb7f0cd48399339e46043205a0b77526 SHA-1: c462b6fdd6d70b04556f69d106e282a200ca3d25 SHA-256: 0fee87ac7ae7bd1ef7234f39d23f69bcc7dd75879d9dded75d09121763b8929e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to direct users to potentially harmful resources. No scripts were extracted, but the overall structure and link farm heuristic point to a malicious intent to redirect users.

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://stjohnsuccpalmerton.com/uploads/1/3/0/6/130604527/130604527.html#pokemon+mega+moemon+rom+download
    • http://ayearinthehills.com/uploads/1/3/0/7/130775219/manizuve.pdf
    • http://rezaurrahmanremon.com/uploads/1/3/0/6/130640194/sonudewemexezebeda.pdf
    • http://vakinc.com/uploads/1/3/0/5/130588729/71075e4a7fb465f.pdf
    • http://www.crystalrogue.com/uploads/1/3/0/7/130739726/godixuxe.pdf
    • http://feralfoxes.com/uploads/1/3/0/4/130476427/fusepila-pawimaker-lebadikami-mafijofaziferu.pdf
    • http://britemoonmarketing.com/uploads/1/3/0/2/130287529/juwakubimilokafesulo.pdf
    • http://burwelltechnologies.com/uploads/1/3/0/5/130539763/tevozulopifexuwif.pdf
    • http://vanessasicaart.ca/uploads/1/3/0/8/130814063/gezusedezowof_jazigedepetor.pdf
    • http://kershawlutheran.org/uploads/1/3/0/5/130540823/tomujifan.pdf
    • http://www.contractorsupplytn.net/uploads/1/3/0/7/130738716/4649174.pdf
    • http://modernpetparents.com/uploads/1/3/0/7/130739923/saxojufamikeluwuj.pdf
    • http://hostmaster.janetssheargenius.com/uploads/1/3/0/2/130289632/9294518.pdf
    • http://www.seraphinatherapeutics.net/uploads/1/3/0/6/130639994/7627071.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_off00006b97.bin
1c4c2780733c0e40d6b4ae43d30248247c27eb61f3f30b75d72f8a3d7e9492f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B97 8808 bytes

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