Malicious PDF — malware analysis report

Static analysis result for SHA-256 223a1dbe4f2ab82d…

MALICIOUS

PDF

118.9 KB Created: 2021-05-16 05:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5581e3236ba50a21e55d8b79ed60892d SHA-1: 662542da885d92460c2a1ba731525a939cb9e3e5 SHA-256: 223a1dbe4f2ab82df7b7f79c637f9d0319b99eb115c9de45d25f96223c913f0d
184 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or scam lure, evidenced by the high number of embedded links pointing to disposable domains and a specific link identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link analysis suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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=magic+bullet+kitchen+express+bed+bath+and+beyond In PDF document text
    • http://tuxesimufimiti.mypressonline.com/54502854303.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/lab_report_19_enumeration_of_bacteria.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/canon_vixia_hf_r800_price_in_malaysia.pdfIn PDF document text
    • http://suwufexez.sportsontheweb.net/33972122455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_e868e4f5272b428bb5c62c38f716e43e.pdf?index=trueIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_fa7ea5f9ff864757af13e35a39a187b4.pdf?index=trueIn PDF document text
    • http://rogoxeruf.rf.gd/how_to_program_2020_bmw_garage_door_opener.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/30874478943.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/3607027525.pdfIn PDF document text
    • http://vutoxexikuru.rf.gd/altivar_31_manual.pdfIn PDF document text
    • http://reduxaxu.epizy.com/sefuvexuravafaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7c8518-26a4-46b2-a33d-11aca6b289f3/bufowubadudabitevizu.pdfIn PDF document text
    • http://padijajuvon.rf.gd/bunawiferisemunemurolu.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_6b0a42227a0641c7a640818e784c509c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/jimev.pdfIn PDF document text
    • http://lenepozomewu.epizy.com/fevumuxudugataxakolo.pdfIn PDF document text
    • http://fusizukokumov.epizy.com/how_to_do_oll_j_perm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c89a0e6-9c1e-4db4-8137-cb25ce9a2155/they_say_i_say_the_moves_that_matter_in_academic_writing_with_readings_fourth_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40115b96-677b-413c-86d3-1cf2b0c3760b/38069365690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5101fdef-33d1-4edd-81b4-42a95c1c8ca5/geometra_y_trigonometra_baldor_nueva_edicin.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/teaching_aptitude_questions_with_answers_download.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_off00018297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18297 3044 bytes
SHA-256: 637f617d24aad7c30a8cc79d179acd33df409ceaac4ed861ba4e1f7f8a5ca01d
font_01_sfnt_off00018d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D82 5712 bytes
SHA-256: 79d184853405ae9d062cc93950e9bb9b2a223568091d9d866d240efb8b10f70d
font_02_sfnt_off0001a0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0F9 12948 bytes
SHA-256: f65b66aa0e38d7fb29de44babe9fb8ce0d05ce76545efdd9d4cfccf00f001ddb