Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea30bafa618971c3…

MALICIOUS

PDF

46.6 KB Created: 2020-03-25 12:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9463b732da818c25e3741ec8ee5fd55 SHA-1: 964d5dba930110068c6ef1f5140a0d59b25be454 SHA-256: ea30bafa618971c363acd548ee07a85a429caa11639b543505efae3c7bbd36cc
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO manipulation or to host malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of numerous links suggests a delivery mechanism for further malicious activity.

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://2020blue.org/uploads/1/3/0/4/130436402/130436402.html#salud+publica+empleos+puerto+rico
    • http://decheapertrash.com/uploads/1/3/0/5/130589209/545474.pdf
    • http://www.rustybarnranch.com/uploads/1/3/1/0/131070431/madepo.pdf
    • http://www.news.businessloans.digital/uploads/1/3/0/4/130494743/5c3c3594.pdf
    • http://saltyleather.com/uploads/1/3/0/5/130551206/mizatopewoxiva-bavikubevekisaz-logatiboroxe.pdf
    • http://tdz539.bdgct.com/uploads/1/3/0/6/130604950/vimox.pdf
    • http://yonatan1222.octarinesec.com/uploads/1/3/0/7/130738723/7df3016.pdf
    • http://gregster60.com/uploads/1/3/0/7/130739456/worowesuw.pdf
    • http://dtg-amusements.com/uploads/1/3/0/4/130479123/kevipexepo_xefojez.pdf
    • http://whollysmokedbbq.net/uploads/1/3/0/5/130588225/723762.pdf
    • http://webmail.yarnjunkees.com/uploads/1/3/0/6/130621915/4715b.pdf
    • http://oregonhomebuyers.org/uploads/1/3/0/6/130622036/5965319.pdf
    • http://ephielynndesigns.com/uploads/1/3/0/5/130539370/vikexokesupuzi_mazusufukizapi.pdf
    • http://londontideway.org/uploads/1/3/0/6/130621900/tulezivitede.pdf
    • http://www.jansostylish.com/uploads/1/3/0/6/130621784/rajebinox.pdf
    • http://coachkayconsulting.com/uploads/1/3/0/2/130271153/tasabe.pdf
    • http://www.beyondessentialoil.com/uploads/1/3/0/2/130289317/2222841.pdf
    • http://happywrappysg.com/uploads/1/3/0/2/130289774/5f7fce2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ca0.bin
b9ce7b437b58ec18723eb2d38831c65349de01e7e3a1825710220b44aad16ce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA0 9020 bytes
font_01_sfnt_off00009d69.bin
59d8a097129a595d6828513bcc5b4d47c00a7c4de9545a43efee4f2c176228e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D69 4288 bytes

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