Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f4315c95458c300…

MALICIOUS

PDF

74.9 KB Created: 2021-03-03 17:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 962b957b453f95c3baefec9dce93c372 SHA-1: de5d82673a8f6c69b3bf633a59e49ecc53257529 SHA-256: 4f4315c95458c30097cb5a04140e1b39683c8527265d7a108defb90a665ffa5f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

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/strik?utm_term=altered+carbon+season+2+release+date+in+hindi PDF link annotation
    • http://nepojar.22web.org/vce_to_conversion_free.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/sivosirorir.pdfIn PDF document text
    • http://malalij.iblogger.org/zusawagadipiromikojekes.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/iTkghhd/catan_universe_game_modes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dumizalu.epizy.com/what_are_the_4_sacred_medicines.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/24971998017.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/amebiase_intestinal_tratamento.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/80058047786.pdfIn PDF document text
    • http://nafabumawo.rf.gd/sifuguzisonerupaveb.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/macros_in_google_sheets.pdfIn PDF document text
    • http://kazigolukujo.epizy.com/hey_ha_ha_ha_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/management_representation_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/1277038396.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 5288 bytes
SHA-256: 4f14e7f58575fca05d8e85b8802cd533279b6d707997204d0701163b249a9838
font_01_sfnt_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 10552 bytes
SHA-256: da443e02dbc27c7c3504555b69eeb1cad59861e064578f1f530178b1f5d7d731

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