Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e19513e24dcbc9…

MALICIOUS

PDF

45.6 KB Created: 2020-03-09 07:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 52d2d576728fc3dfb1c4732ad89a1887 SHA-1: 3687aa645f829bec070ef6a958fccfdad2dc8d1a SHA-256: 78e19513e24dcbc9ed57f8442b5cf8f5932c98e0658527ce8a34c3af66388fa0
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, identified as a PDF_SEO_LINK_FARM heuristic. The primary external URI points to a .html file, suggesting a redirection or landing page. While no scripts were explicitly extracted, the nature of the link farm and the ML classifier's high confidence indicate a malicious intent, likely to drive traffic to malicious sites or host further payloads. The document's structure and content suggest it is part of a larger campaign to manipulate search results or distribute 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://gi30q.slpny.com/uploads/1/3/0/7/130740141/130740141.html#carbon+adsorption+efficiency
    • http://www.parvacolombianbakery.com/uploads/1/3/0/6/130622041/728375.pdf
    • http://www.beaconeducationservices.com/uploads/1/3/0/6/130639976/wirizo_muduta_fibefizom.pdf
    • http://bizania.org/uploads/1/3/0/2/130289693/bodefazonotumam.pdf
    • http://andigeloolaw.com/uploads/1/3/0/6/130622066/wevavegab-ximapitu-nonepoluwagevi.pdf
    • http://airporthoppermaynooth.com/uploads/1/3/0/5/130590371/46ba4.pdf
    • http://mewantemooseicdayglasgow.com/uploads/1/3/0/2/130271132/wikid.pdf
    • http://eseifs.com/uploads/1/3/0/5/130550873/1757081.pdf
    • http://limitlesspilot.net/uploads/1/3/0/5/130589213/a71995c4e7.pdf
    • http://nataliezinawalschots.com/uploads/1/3/0/4/130476403/7137170.pdf
    • http://sportscomplexlv.com/uploads/1/3/0/7/130739592/48730f7c369ca9.pdf
    • http://havensofmanhattan.com/uploads/1/3/0/7/130775876/komexerez-surademonufi-fezusufafumojaf-sewidewixu.pdf
    • http://castlebridgeshop.com/uploads/1/3/0/5/130539344/460918.pdf
    • http://canapakm0.it/uploads/1/3/0/5/130551023/nuzavejo.pdf
    • http://www.darleydaleequestrian.com/uploads/1/3/0/5/130542780/8161963.pdf
    • http://blockchainbetterbusiness.com/uploads/1/3/0/5/130541356/198138.pdf
    • http://diamondivy.com/uploads/1/3/0/5/130543980/putavano.pdf
    • http://portlandareabankruptcy.com/uploads/1/3/0/5/130539109/maposizuxiziko.pdf
    • http://redbridgepainting.com/uploads/1/3/0/7/130739280/4ffa0d401caeba6.pdf
    • http://stjosephelkoym.com/uploads/1/3/0/7/130774979/91e2ad1.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_off0000847e.bin
269203d994d7dc3a81c26418905993153be83c1561398827d79017e91ac248f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x847E 9340 bytes