Malicious PDF — malware analysis report

Static analysis result for SHA-256 0028e93f94281adf…

MALICIOUS

PDF

32.5 KB Created: 2020-04-05 12:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 304ba814294e7d9e043892abd70280eb SHA-1: d8a6c1eb23bcdb48d123f8adbc1453349ee1275d SHA-256: 0028e93f94281adfc953fcbcd45d9906d2b4566dd1ca8f60ae2af7c8ab05799b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the document body, though obfuscated, contains URLs that are likely part of a lure to drive traffic to potentially compromised or malicious web pages. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://alphamaxtax.com/uploads/1/3/0/6/130620427/130620427.html#the+scarlet+pimpernel+tv+series+watch+online
    • http://teamggc.com/uploads/1/3/0/4/130435715/cf63b2.pdf
    • http://gillettebikeshop.com/uploads/1/3/0/5/130589416/971934fc.pdf
    • http://onthegroundresearch.com/uploads/1/3/1/4/131407504/29678b6cdeaff6.pdf
    • http://www.thedolphinboat.com/uploads/1/3/1/3/131398367/a00856.pdf
    • http://rider-tech.com/uploads/1/3/0/5/130540501/reledu_ramebugiludev.pdf
    • http://stefanoseleftheriou.com/uploads/1/3/0/4/130490399/c72a0bcace7aa.pdf
    • http://toptennis1.com/uploads/1/3/0/2/130289738/4767371.pdf
    • http://mrsmuenks.com/uploads/1/3/0/7/130739837/18ea1f.pdf
    • http://myhssr.xyz/uploads/1/3/1/3/131379716/jadedujigorux-venijiv-metonododa-koxurukid.pdf
    • http://pipeline-con.com/uploads/1/3/0/3/130323160/tokukawazo_rimawolami.pdf
    • http://histomedical.com/uploads/1/3/1/4/131438059/rafodilekunevuzope.pdf
    • http://radioboo.be/uploads/1/3/0/6/130604382/6674873.pdf
    • http://mocakolaid.com/uploads/1/3/0/5/130590026/sotodoba-jisemup-bezegipowozaz.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_off0000575a.bin
117521b2b93de7a1f1cdfc6f55f2c9a3ef8b11e3e8d9a0c8c724f219b7a4236e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x575A 7096 bytes

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