Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b5c98f671294e6…

MALICIOUS

PDF

80.5 KB Created: 2021-04-28 15:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ffc6cbd1bfc6f7a690f375e1d9b91989 SHA-1: 4b716da4adf2d974d1ccf2fc97486cae20ff7ab6 SHA-256: f5b5c98f671294e6f8b4713f63edcf603cd8cfb24af112c06d4ebc06a060e595
192 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm hosted on disposable infrastructure. The presence of a "download button" heuristic further supports a deceptive lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/strik?utm_term=autocad+save+to+web+and+mobile In PDF document text
    • http://giwewigipebi.medianewsonline.com/4325189600.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/63609994603.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/holy_quran_app_apk_download.pdfIn PDF document text
    • http://thechambre.xyz/gesivawedapuwuburuo4v.pdfIn PDF document text
    • http://zurujavurobe.scienceontheweb.net/angioedema_adquirido.pdfIn PDF document text
    • http://bodyita.space/93744060246xz462.pdfIn PDF document text
    • http://wozonos.22web.org/fl_vehicle_bill_of_sale.pdfIn PDF document text
    • http://fotodosajube.22web.org/tilupizodor.pdfIn PDF document text
    • https://ravijirigiraga.weebly.com/uploads/1/3/4/6/134649302/xukisijumaxuxusotu.pdfIn PDF document text
    • http://kokilubowo.22web.org/57206116645.pdfIn PDF document text
    • https://buriviniroxino.weebly.com/uploads/1/3/1/6/131606563/gisumemo.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/73760304717.pdfIn PDF document text
    • http://zanodopowe.sportsontheweb.net/32511782006.pdfIn PDF document text
    • http://fesuzeroba.iblogger.org/16163961988.pdfIn PDF document text
    • https://litazivufili.weebly.com/uploads/1/3/4/3/134305244/juliduwolo-modix-burafamipoduwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitodake.myartsonline.com/central_dogma_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54962f41-d793-40e7-b1f4-0c8b7c2282a4/the_little_prince_full_movie_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58cd70bb-58ed-4c3a-8ad0-ff1d9c753696/17799954564.pdfIn PDF document text
    • http://givemuzod.epizy.com/penatalaksanaan_bronkopneumonia_pada_anak.pdfIn PDF document text
    • http://xejawaji.myartsonline.com/33143233565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f69853-46b9-4f72-a4aa-653da5fc483e/bifarinipuvagowojatikadal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f7637b-4925-4ae8-b387-b3f97863a2e2/60043671053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873ab2cf-775a-4628-9a94-f22071eaeb37/words_that_start_with_k_to_describe_someone_positively.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_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 4032 bytes
SHA-256: 51036caeaaec89de8680405f123e86dc84267b6fe8b2de34ea0e6c667ded1fe3
font_01_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 5268 bytes
SHA-256: c1861e8c9e3f325320cfefb7ade1a3748563c4899bb2ba3b2048310cf4df1ff3
font_02_sfnt_off00010a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A00 12084 bytes
SHA-256: 421d7379b56db1a693297b1b64998c34a82b35e41bb37570ffe5986e55e7c7c5