Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a159393d76b9756…

MALICIOUS

PDF

69.2 KB Created: 2021-03-28 17:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 426c77649daae7abe5dbe2bc202a710b SHA-1: 2c1a234ae091c308c5957558fe1ac9ee0a2d104c SHA-256: 4a159393d76b9756069c763b3a1fb34794d6078f7096811047864c7478ec8cf6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

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://golowaki.ru/123?utm_term=almond+flour+banana+bread+nutritional+information PDF link annotation
    • http://pifedalune.medianewsonline.com/pomebunidewubola.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379240/normal_5fe15dc51fc2d.pdfIn PDF document text
    • http://wugilunage.iblogger.org/persuasive_essay_examples_middle_school.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/office_admin_job_description.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5fd37753f2e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_6021240a589ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_603e4ec41f87b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5ffac0e9039ac.pdfIn PDF document text
    • http://joxotowefi.iblogger.org/57249267860.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/organelos_celulares_y_sus_funciones.pdfIn PDF document text
    • http://bepedegikojafeb.22web.org/how_long_does_it_take_to_get_hired_at_rue21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422912/normal_602fe6f62e986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_600d1204244e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/tiritanoxupasakalotanibo.pdfIn PDF document text
    • http://wifavar.epizy.com/business_model_generation_canvas_deutsch.pdfIn PDF document text
    • http://joxevabo.epizy.com/voidstate_squad_builder_2.0.pdfIn PDF document text
    • http://lunujebof.rf.gd/is_my_friend_dahmer_rated_r.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/55731946299.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_off0000d441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 5004 bytes
SHA-256: c3d26fbf8a4fea46f90cb9e8a8fa5bd7a2b16c88bfcd434a559d08ad2e6f0cc1
font_01_sfnt_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 10052 bytes
SHA-256: 546582e1439461d97ceb73e12a21ecd54856a0b70605cf0910af80f4e6958828

Open this report in the interactive analyzer, or submit your own file for analysis.