Malicious PDF — malware analysis report

Static analysis result for SHA-256 177ccf5b105a214b…

MALICIOUS

PDF

77.4 KB Created: 2021-03-21 11:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0b4a0fdf6bd46ca5194c046324abfe90 SHA-1: fb01163628c92fa093d6cbbbc16eb60ed9dbee3c SHA-256: 177ccf5b105a214b761a6fd7bb2857dfcb2d273f16f960bd3e149cec798fbe57
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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
  • 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 https://botokaw.ru/wix?keyword=mr+kyran+o%2527donnell+mla PDF link annotation
    • https://cdn.sqhk.co/supesuvepo/8pighae/vivomemogivoguma.pdfIn PDF document text
    • http://1xbet-registrat.site/irregular_verbs_in_spanish_listxxvll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482882/normal_6029edb1f1c8f.pdfIn PDF document text
    • http://iclod.tech/maintenance_forms_and_recordspw3q7.pdfIn PDF document text
    • http://startask.ru/20870060144jl9d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474205/normal_60019e69dff4a.pdfIn PDF document text
    • http://winoorama.fun/72788473993vih9q.pdfIn PDF document text
    • https://cdn.sqhk.co/tojofelekob/B94uibE/12764758938.pdfIn PDF document text
    • http://andyhong.blog/16152522052crd5w.pdfIn PDF document text
    • http://kurs1.xyz/viking_village_apartments_salem_oregoneukot.pdfIn PDF document text
    • https://cdn.sqhk.co/wojinagimepu/giajbje/1807828693.pdfIn PDF document text
    • http://copyrightnotices-form.com/vavegajola9dojr.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/ehfHi04/defender_2020_for_sale_australia.pdfIn PDF document text
    • http://joblanc.xyz/cerere_preschimbare_permisq22vz.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/djihfif/68849587688.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/17185013644w9jho.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_60224d596903e.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/dgdkVie/91619667152.pdfIn PDF document text
    • http://fragcups.com/avent_breast_pump_manual_bootslx7s7.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/ajbii3A/talufekupufebopeloxu.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/vxqjfib/41706814973.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90b066d-c3c1-49a8-9695-f41794c3fc19/fajenatowijigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e81518-1704-41a5-be6b-56c7fee98f27/bofilusugor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368c12d1-d0e1-4f25-b243-70a46ccc3ff6/dir_655_als_access_point.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F1 5000 bytes
SHA-256: f2f11b10504fb473ef96e7d9cbd811ec1cc1d938ce1716f3e2c0d07f9766e116
font_01_sfnt_off000102f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F7 10876 bytes
SHA-256: af88a2833c983c4953f65b0e9e118c3f7b8f280e6dc90df33231ddeb3230d0c8

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