Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f597d95f6a7c7c7…

MALICIOUS

PDF

67.6 KB Created: 2021-03-20 22:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d49664646e2af238e6c466c01104aa39 SHA-1: 6e08ba02ceee6eaf9f35a4065b554c613e114a73 SHA-256: 9f597d95f6a7c7c7aa365f7776c77c36ce98d099981eb8ab5b220e6318b95cf1
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8464

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://midufefew.ru/aws?utm_term=model+3+price+tesla
    • http://mitedujonajezed.scienceontheweb.net/41560228587.pdf
    • https://static.s123-cdn-static.com/uploads/4455197/normal_5fdd3869f2b68.pdf
    • http://kawasus.scienceontheweb.net/fozabufuzigaxigikokope.pdf
    • https://cdn.sqhk.co/vivokunavu/kpjfZeT/91277233154.pdf
    • https://zaporori.weebly.com/uploads/1/3/4/1/134131460/netebawudiroxetulop.pdf
    • https://cdn-cms.f-static.net/uploads/4454968/normal_603cbcbca81dc.pdf
    • https://dibozuvoba.weebly.com/uploads/1/3/4/6/134692955/656358.pdf
    • https://cdn-cms.f-static.net/uploads/4383128/normal_601bcb2b94965.pdf
    • https://cdn.sqhk.co/zamikukodef/hfyhejj/30090551066.pdf
    • https://cdn-cms.f-static.net/uploads/4501810/normal_6037f6467ab0f.pdf
    • http://fetedeju.mygamesonline.org/which_country_represents_babylon_today.pdf
    • https://cdn-cms.f-static.net/uploads/4460228/normal_604166a348edb.pdf
    • https://cdn.sqhk.co/gonibowijum/d8c2yhf/hockey_themed_food_names.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zejeganemumejow.rf.gd/68768003691.pdf
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_959f0c97a23d4a729ee31fc6ccce96cf.pdf?index=true
    • http://bopufadepop.epizy.com/zapipevafogagijerip.pdf
    • http://nupakavidowux.epizy.com/kegukanikimuruduramop.pdf
    • https://20097937-9b7a-4da4-851c-33e9a8906939.filesusr.com/ugd/1e3518_64a951f209a64e78bc8efca6c7f57e03.pdf?index=true
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_ed82e6910b994b1da076c4d70428c9eb.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d4.bin
f7a0bb9f514b417db562b05596476cdb2ec3f9e86c6e7df3cfc5c5b802415b2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 5236 bytes

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