Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ce100cae41bb7fc…

MALICIOUS

PDF

72.0 KB Created: 2021-02-18 16:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f883b4d9a0df61a1a871b92548472614 SHA-1: 29e65fc399f72ddabdd4169fece1cc98d08202bf SHA-256: 2ce100cae41bb7fc58d9685455902055acf57f903abe62d48037c5c5e138f501
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'Is zero zero zero a true story', likely directing users to malicious sites for further exploitation.

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://leonvi.ru/wb?keyword=is%20zero%20zero%20zero%20a%20true%20story PDF link annotation
    • http://pimadukemaxi.22web.org/46363812661.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_5fee9219c99fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495043/normal_5fd79f1f93f62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5ffa3c91dec5c.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/fHMidgc/51982389679.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486535/normal_5fca707b4b82e.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/wShc86c/modern_age_president_simulator_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/iHiejhZ/juzedutotilosop.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/fatisake/avengers_logo_vector_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/affirmative_action_plan_forms.pdfIn PDF document text
    • http://xixupokolaxusuv.epizy.com/cadastral_surveying_textbook.pdfIn PDF document text
    • http://nunevubedodunu.rf.gd/zanubar.pdfIn PDF document text
    • http://sovizurimi.rf.gd/free_business_proposal_template_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/14522612298.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_off0000d0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CA 4464 bytes
SHA-256: 2c27638c8faa88190710fc9d7ac933118dab9a17b9631f56cc84efa024281f70
font_01_sfnt_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 10412 bytes
SHA-256: d7369cd449eed54978011b8bd90486f3445d4af450f1749881879e606fb23bbc
font_02_sfnt_off0001038f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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