Malicious PDF — malware analysis report

Static analysis result for SHA-256 b409fad5c228acaf…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 00:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 161e72fd644e3d8c492dbc5e7bd290c4 SHA-1: 7289e59241bfa38e3b40ff9f3b9b1018f22d07ef SHA-256: b409fad5c228acaf309a4acab8527c853d51802ed22601b94bf08947d19ad1cd
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, particularly the one pointing to 'fokemale.ru', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/award?keyword=alimentation+b%25C3%25A9b%25C3%25A9+6+mois+tableau+pdf PDF link annotation
    • http://dufifudusimube.mygamesonline.org/iso_31000_risk_management_process.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/64093938435.pdfIn PDF document text
    • http://kabejorudedofom.22web.org/50_words_with_synonyms_and_antonyms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450044/normal_5ffcdf4e524e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418747/normal_605c95c1b5d29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446923/normal_5fe19fb98867c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_604e5fbbc1f64.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/72875746125.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/0cc79813-fd25-47ff-a76a-21e14eb27b0a/what_is_the_climax_of_the_veldt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ca3bb9-df3a-471d-ba8e-91f829d84d0b/what_is_the_maximum_size_of_a_carry_on_bag_for_american_airlines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/715aad2d-25c7-4f48-b02d-5bff62419216/30774564105.pdfIn PDF document text
    • http://lezaketego.epizy.com/51977970508.pdfIn PDF document text
    • http://bekovomojuto.epizy.com/tiwunaxazodokusamalife.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/absage_bewerbung_ausbildung_formulieren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/991b9f42-6fcb-4db4-9fa1-379b23ceb3c7/51234696868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b489f344-de54-41a7-9112-96d35541be93/free_printable_air_fryer_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/ninestars_trash_can_battery_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0d875a5-e45f-46db-a0c0-924439b4a123/how_to_turn_off_voiceover_on_ipod_nano_6th_generation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee99a90f-ba02-4efd-b51c-d3e5e96e1765/wapunutevirizisone.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/47294878222.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/boxifitiduseno.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_off0000e8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C5 5396 bytes
SHA-256: cb6dbbcb90ed9eab40512eccc90e87d24d15751a71f8dd30a0a2d1b17e3642d2
font_01_sfnt_off0000fabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABB 11204 bytes
SHA-256: 04a87312464531b5b32823176159f14a850c5ebc3f4f07ae25e7f9c9d87fab29
font_02_sfnt_off0001206a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c