Malicious PDF — malware analysis report

Static analysis result for SHA-256 54301f11ab8e2caf…

MALICIOUS

PDF

78.2 KB Created: 2021-03-14 16:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad476a67de199f9425c2f3c7c8d5552b SHA-1: b72749cca6a2636734edb3c75b67763394f72bb3 SHA-256: 54301f11ab8e2cafcac9aca399748daa42f9d55bdacdccca9445d5c5966d5b54
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file functions as a link farm, containing numerous embedded URLs. One of these URLs, https://dafemum.ru/award?keyword=calendrier+belge+2020+pdf, is identified as a malicious redirector, indicating a phishing or malware distribution attempt. The file's structure and the presence of a malicious redirector strongly suggest it is intended to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 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.
  • 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/award?keyword=calendrier+belge+2020+pdf In PDF document text
    • http://wejaduz.mypressonline.com/87795396088.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/greater_bay_area_initiative.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/vuwunomomoxuxovuvokavani.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/what_do_self-knowledge_mean.pdfIn PDF document text
    • http://difozoxezepi.getenjoyment.net/2530828023.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/12498763147.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
    • https://uploads.strikinglycdn.com/files/b2f72efa-5fb5-4c2f-9c3b-2f0f0e444445/warhammer_fantasy_5th_edition_rulebook.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_6b690ae650af4007a27f6e3bfd5817c2.pdf?index=trueIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_de2c0768f6e74e1fba9cd1523ed39a09.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc89e28-7b87-4019-ac6e-e9dd33a0735b/average_top_speed_of_a_50cc_scooter.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/rokumumazid.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_1e5955e15cf84478a78cd949b16045a9.pdf?index=trueIn PDF document text
    • http://zimopup.myartsonline.com/caps_for_sale_crafts_for_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561f5a7b-50c3-4b96-936a-28be3365ce78/how_to_make_your_own_face_mask_at_home_easy.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/22901333301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8f993e-9750-4076-8dfd-0bf3c1eef011/is_the_magicians_season_5_on_netflix.pdfIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_eeed190e83544eb181d734bbdd0db218.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/170a4f13-2a91-4c12-be59-324a77510af6/53175364527.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_1a577bfcc6aa420686cb9ae5a508cc29.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b19fc94-1956-4f3d-bc82-66f61cbe3202/police_chief_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b434258-7fc4-4017-b6cd-fea686faa24f/gibop.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/why_is_my_laptop_not_charging_on_my_docking_station.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd7808b-090c-4e6f-a72a-1a20dea57d6c/54612494798.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_22841f175e8945fc882e4826c288de22.pdf?index=trueIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_06e615faf2e34494a6a8f72525313c96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dea1772-8a8c-468b-92e2-08620db8d8eb/osha_ppe_safety_training_videos.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_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 5068 bytes
SHA-256: fe3e4ed97e71e36d15616f9b22e1596b38c008a2a866f2631b8af4b3cdeff2ca
font_01_sfnt_off0000f5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D0 11672 bytes
SHA-256: bf8ce40d7214f86cd9e7653986bdfc726d5aa1d1bad80d45f4776a1fdbe57eb4
font_02_sfnt_off00011afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e