Malicious PDF — malware analysis report

Static analysis result for SHA-256 618e27a2ff1f1fe8…

MALICIOUS

PDF

69.3 KB Created: 2020-12-23 01:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 86a14d75914b2e758fb3ab4f6ad77d6c SHA-1: 3ab17583468448be2b12c5b655a7e99692f376a3 SHA-256: 618e27a2ff1f1fe8affb2f0b3132d0eedb50b3704262ee06ad5ec12643b046ae
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains strings related to the lure 'Project blue book the game hidden mysteries', suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=project+blue+book+the+game+hidden+mysteries In PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/reduwug.pdfIn PDF document text
    • https://lejomibis.weebly.com/uploads/1/3/4/6/134657815/089d80b7e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487662/normal_5fab0ae01f7e8.pdfIn PDF document text
    • https://mekukirofex.weebly.com/uploads/1/3/4/5/134589797/c751cf61da3.pdfIn PDF document text
    • https://tumovapexawezan.weebly.com/uploads/1/3/1/3/131398362/2876830.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/5b0c5a0b-83a4-4596-a287-c38d353e0b09/stranger_things_font_generator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67d2879f-0d27-43c3-87d8-2dd599ff5341/concepts_of_independence_inc_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51b5de6-fa22-4f34-8edf-506eb8ba5ff8/dozefutemutewiwetolobujid.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/3095721693.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3799d60f2895dc1f82192/t/5fd1dd4199fe644e8a621519/1607589186128/34060381427.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013a70a2757459bde56bb/t/5fc0f8039ee0f32b87757fea/1606481927001/11363376292.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_off0000d1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DF 5736 bytes
SHA-256: 0cad2ec3a99e6e26f01c9be60ab7afccec8a4ace5915cc4131ee86f845eecec8
font_01_sfnt_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 10248 bytes
SHA-256: 38dffc4799a5a05102b8af3e7a4fc8be4fcc538b8b401d8ed48fdcb18064b598

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