Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d6f0676054992f…

MALICIOUS

PDF

80.8 KB Created: 2021-04-25 11:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8f3bfe9e5b1af44aee6a6047c43bc2b5 SHA-1: 21e3bbdae514b017b8a2b4262eafe05895a46751 SHA-256: 52d6f0676054992f389b5c589a9141c9461ace4d09f2384c897ee7a8c7a3c784
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to URLs that likely serve as download or redirection points for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://lozipotod.ru/strik?utm_term=how+to+teach+your+child+bible+verses PDF link annotation
    • http://1xbet-registr.site/tim_tharp_the_spectacular_now_ending73num.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/aadhaar_card_password_2020.pdfIn PDF document text
    • http://bupetud.xyz/fodufupozexabesojwk70c.pdfIn PDF document text
    • https://cdn.sqhk.co/wibezudak/GgfjaEq/xakelatimakipoguzutef.pdfIn PDF document text
    • http://weximiwoxom.iblogger.org/57508828700.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/djcijgj/vuputemezurotizufa.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/IibwlNo/gta_san_andreas_super_bunny_hop_cheat_ps2.pdfIn PDF document text
    • http://egosikenclub.com/25941004248pav40.pdfIn PDF document text
    • http://pay-order.info/bizhub_c224e_firmwarew3fl7.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/clinical_cases_in_anesthesia_4th_edition.pdfIn PDF document text
    • http://tiktoktop.design/563146574486aa2r.pdfIn PDF document text
    • http://pozuvixa.getenjoyment.net/knn_algorithm_in_machine_learning.pdfIn PDF document text
    • http://terem.space/pixel_art_candy_color_by_number_onlinedf6m4.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/ibjiyKj/kibevovomomi.pdfIn PDF document text
    • http://zootime.store/cucumber_api_testing_java_tutorial2daw6.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/rO9Igh6/keto_pancake_recipe_dairy_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fexotupakel.rf.gd/bilateral_cleft_lip_repair_techniques.pdfIn PDF document text
    • https://cabae152-0d18-4cc7-9545-8711a89e332e.filesusr.com/ugd/607e04_6442717d6e2f4402baa6b15475612e44.pdf?index=trueIn PDF document text
    • http://kezadovimitaw.rf.gd/kowtow_crossword_answer.pdfIn PDF document text
    • http://xomawerowikevof.rf.gd/rifarinoxizosejebaroxapol.pdfIn PDF document text
    • https://c78ffd2e-fc3d-4272-86ca-968d835fb7ad.filesusr.com/ugd/0f9ef0_bffdd68304be424eb1de3ad6cb7efb76.pdf?index=trueIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_c6b0a3a5f4f149019610b92ab410df2b.pdf?index=trueIn 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_off0000fceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 5380 bytes
SHA-256: 438909926f1887031534317cae72e677aa8a5cd038468e129558ba003f0c0ed9
font_01_sfnt_off00010f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F44 10888 bytes
SHA-256: 0f1ed2f35a7c458d6dc20541a455af2933c2ee716e4482915c4b01d355dfecd2

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