Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c45f1f0d225d91d…

MALICIOUS

PDF

128.5 KB Created: 2021-03-21 12:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 161908e978db18cf5056bb47722984af SHA-1: dd3f8c97b56122a07137fcaac0f0fa10d4f393ef SHA-256: 4c45f1f0d225d91d3425fbb306d4238f61a334d76f9564021a88c72784d2eaaa
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

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://golowaki.ru/award?keyword=mapa+provincia+almeria+pdf PDF link annotation
    • https://pugefaguza.weebly.com/uploads/1/3/5/2/135299010/957ddd2f61e.pdfIn PDF document text
    • http://reflectionss.space/defegosinetilowipizijuzoc76km.pdfIn PDF document text
    • http://vpntop.info/ge_telephone_answering_machinejywv4.pdfIn PDF document text
    • https://lanuwoga.weebly.com/uploads/1/3/1/6/131637333/e59e942e5.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/tejetu_tejigoterup_zudad_xufesujusu.pdfIn PDF document text
    • http://vebafaguxaw.22web.org/estructura_de_los_textos_argumentativos_ejemplos.pdfIn PDF document text
    • http://sweetmeet.online/japejufuet2dm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://volenivojox.epizy.com/arbonne_30_day_challenge_food_list.pdfIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_3e58692cee8d4c11b291c63f7fd170f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/06483d23-2629-4689-a2cc-8432535b39fc/the_missing_season_1_episode_1.pdfIn PDF document text
    • http://nozuwodapa.epizy.com/78440302821.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_35f3f01046774eb190fae077c58361cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ed12ae2-ec14-473a-bd44-10a2e0b058de/65052375556.pdfIn PDF document text
    • http://magivaxinel.rf.gd/movies_hd_apk_for_ios.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_695cd2e6301b4a709ba27ad5f1a385c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ceb878-4e89-45b9-ab75-b20bc6a8f08b/latitude_e6410_touchpad_driver_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d843d4-c186-4d42-99f0-0171275ed233/kindergarten_math_addition_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b9f2f0-85a8-4feb-8ddd-8bcf8f91a951/1990599744.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_a99cea9e32104bfea09c4fa5c4b3bddd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a153352c-609c-457d-b977-a55cd4038484/32401877701.pdfIn PDF document text
    • http://xugeseza.epizy.com/what_is_onenote_2013.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_off0001b55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B55D 5188 bytes
SHA-256: 2dd035d0cc624827d7f1d6e12a6ef1ec5ee15bf11efd209d22023a23f1d56417
font_01_sfnt_off0001c702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C702 13688 bytes
SHA-256: 5a945ef67fea03497b1c98fe1a022b095f98f2b625e0b937ebc19fe4cba1eae1