Malicious PDF — malware analysis report

Static analysis result for SHA-256 0baadeadafe2d8ff…

MALICIOUS

PDF

77.4 KB Created: 2021-03-02 15:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 20cfbcc21ad9a8da487f0070cf6dbf08 SHA-1: cadbe53821173e8ccc3df3f295a95202cd57e0bf SHA-256: 0baadeadafe2d8ffeed1f6b4b2546a7d228e81aa5c3642cd23dfad0e43330009
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous URLs, with one prominent external URI pointing to 'nipisod.ru', suggesting it acts as a lure to a potentially malicious site. The PDF also functions as a link farm, further supporting its role in directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/award?keyword=the+endless+game+movie+rotten+tomatoes PDF link annotation
    • http://busotokebos.iblogger.org/wonosinipuwobumuwewabim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5fd3cd8f2735a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5ff8479dce5f1.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/kaxidiwewiwuvug.pdfIn PDF document text
    • http://shortsomfj.space/wakuluve0yh4j.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/ruxegagavefopuwig.pdfIn PDF document text
    • http://keto-menu.online/computer_network_architect_education_and_trainingf61q9.pdfIn PDF document text
    • https://futilupotozuvat.weebly.com/uploads/1/3/1/4/131454482/5580474.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/age_regression_comicshsykg.pdfIn PDF document text
    • http://wersita.space/catecismo_da_igreja_catlica_completonpxwa.pdfIn PDF document text
    • http://bogplaktnc.fun/jugaje8bu49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_601d56d7536c9.pdfIn PDF document text
    • http://sokfresh.fun/diversity_meaning_in_english_oxford8chea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mudurixo/41676765399.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/back_exercises_nhs_inform.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/anime_cloud_apk_ios.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AA 5036 bytes
SHA-256: a5dbb700e8f882e42e5f681423f6766036b230b02964506ffdd9863116e8f235
font_01_sfnt_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 10564 bytes
SHA-256: 109f5ac23a6a253323f968dc6321c07d40f52631624169e2cba58b089ffe401b
font_02_sfnt_off00011a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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