Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b772f9484eef74…

MALICIOUS

PDF

79.5 KB Created: 2021-04-01 07:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 918fd75e4b57821c33c3c29bb5372323 SHA-1: 27c2061b8ff9f676b4936efd19e572da3458bff6 SHA-256: 53b772f9484eef74f163f585c7e8d3c4111ac299d49661df0f2e9b793e2b6aee
186 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 high likelihood of malicious intent. It contains a large number of external links pointing to various domains, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of multiple PDF links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/123?utm_term=rustoleum+cabinet+transformations+on+laminate PDF link annotation
    • http://phulop.store/expanse_calibans_war_review58bws.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/59338059016.pdfIn PDF document text
    • https://zoredufuno.weebly.com/uploads/1/3/4/6/134638801/7975803.pdfIn PDF document text
    • https://cdn.sqhk.co/xozifejor/gXjgcsq/animal_jam_play_wild_beta_testing_sign_up.pdfIn PDF document text
    • https://jebezijako.weebly.com/uploads/1/3/5/9/135964749/sirasujuvexadom.pdfIn PDF document text
    • http://davorivugexawu.sportsontheweb.net/general_characteristics_of_phylum_echinodermata.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/Y5hhib8/vukurajusazogoroberivetug.pdfIn PDF document text
    • https://zabojipenow.weebly.com/uploads/1/3/1/6/131636987/diwewewibam.pdfIn PDF document text
    • http://mmmuuuue.space/senokot_syrup_patient_information_leaflettgj3e.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/25a9ead08981.pdfIn PDF document text
    • http://homeolimp.com/dias_feriados_para_el_18_de_septiembre_2019mhbar.pdfIn PDF document text
    • http://sodalabs.club/duxikipeseguw1k67.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/e5wggWy/stainless_steel_checker_plate_weight_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/YPhjGW1/zapiromabiradulazaxu.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
    • 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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 5056 bytes
SHA-256: 88eb00245f5028b77230ad765fefffafba27892ae6bfc9b91a7703d7ff862814
font_01_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 11192 bytes
SHA-256: bd6e4d9d4d3f53e3e80a6481f0df799cbe8a22e5a75065dd43b08b42e211a6d8
font_02_sfnt_off000122ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122ED 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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