Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d22d56977a073fb…

MALICIOUS

PDF

76.7 KB Created: 2021-04-08 10:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b42e1cf20166d4bb1e47efb966beeecb SHA-1: ee3d4c78cf6812ab583121dd7af69cfcf169af0e SHA-256: 6d22d56977a073fba6b70dd0cf7a1628c120a6127405acc4bc9baca30fd88923
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to suspicious domains that are likely part of a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=cultivo+de+arroz+en+el+ecuador
    • http://profaudit32.ru/angka_penting_adalah7wztj.pdf
    • http://xtreme-sport.ru/reading_comprehension_workbook_grade_5a2nkf.pdf
    • http://indital.space/19373557191vcxjt.pdf
    • http://zememor.sportsontheweb.net/77035821794.pdf
    • http://netewe5.xyz/manhattan_new_york_weather_reportham0y.pdf
    • http://circulshtangcalip.website/suraxihhdw.pdf
    • http://lemafesopeposuz.mywebcommunity.org/how_to_become_a_chick_fil_a_vip_member.pdf
    • http://vigirorimikana.medianewsonline.com/11766411688.pdf
    • http://oyuncuxx.com/zokobejitomujhgu8.pdf
    • http://datab.vip/kali_linux_nethunter_nexus_6ponncg.pdf
    • http://visunuduxat.mypressonline.com/nukifusalodapevutoroba.pdf
    • http://tronreserve.online/barber_shop_midwood_brooklynk6vhe.pdf
    • http://idealsit.fun/taurus_pt111_g2_9mm_feeding_problemszi1dl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ab0b905-20f5-4271-a280-cefb0edf2ae6/49a_miguel_street_san_francisco.pdf
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_95a5e276153a4ec6921ee9e6f536c410.pdf?index=true
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_890ea53d43084c37847d65308e0f18cc.pdf?index=true
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_0ed0adea5e1e46f4bfe8137301d1a934.pdf?index=true
    • https://uploads.strikinglycdn.com/files/76a0c376-c161-4b4f-b611-d3b0c3c474f4/samsung_sew-3037w_baby_monitor.pdf
    • https://uploads.strikinglycdn.com/files/c06ed531-eead-466b-a333-928ffafbd0e4/22021605526.pdf
    • https://uploads.strikinglycdn.com/files/32cdcb4f-5bc7-4fb5-a1ea-ce234a2a8c27/the_summer_i_turned_pretty_book_2.pdf
    • http://sazebufaz.atwebpages.com/comparison_of_adjectives_list.pdf
    • https://uploads.strikinglycdn.com/files/afac6327-acb6-47db-b521-3d7984161751/28185242740.pdf
    • https://uploads.strikinglycdn.com/files/7aeb288d-c104-4be9-a37e-21dd58b3ed0d/nobokizoxebunix.pdf
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_d949fb6b7ff0466498240a5d42b68f0c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c15ecca9-734c-4119-a876-0e7868c9ab88/47550410176.pdf
    • https://uploads.strikinglycdn.com/files/f6832ddc-c38f-4a47-bffe-3495e68a3ab4/how_do_you_disassemble_a_graco_pack_n_play_with_changing_table.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed56.bin
0099e64a3921501f204ed84545314bc13e918b31093b64909aca1de07781dfb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 4772 bytes
font_01_sfnt_off0000fda6.bin
1b94a7d9b3c524c0198a6b2e1d9f0cc76563cb7832b962a0e8d79457fb898951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA6 11636 bytes

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