Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1436219d8e687d7…

MALICIOUS

PDF

82.0 KB Created: 2021-04-02 16:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 30fd1a09a33002b19506b649a72350f6 SHA-1: 6e19fa1626397a342f30078f7e9ac4d1dd6f2337 SHA-256: e1436219d8e687d7ad7ace43d91e8f00867501bd9fc8e992fb81489273cb664d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://soxebez.ru/123?utm_term=cyberark+epm+guide PDF link annotation
    • http://bnatural.space/dvp_sr210p_manual1c234.pdfIn PDF document text
    • http://arboozfilm.com/technical_analysis_books_in_hindi4wz1e.pdfIn PDF document text
    • http://digitalmicroteter.xyz/a_series_of_unfortunate_events_books_age7tcik.pdfIn PDF document text
    • http://axecheat7.xyz/how_to_use_the_gentle_leader_harnesstwojr.pdfIn PDF document text
    • http://itclick.info/critical_analysis_on_the_great_gatsbyrevtm.pdfIn PDF document text
    • http://fionainthefield.org/psychology_in_everyday_life_4th_edition_free55wrh.pdfIn PDF document text
    • http://5-euro.info/kidokagusouu6.pdfIn PDF document text
    • http://aromaita.space/how_to_write_my_hobbies_in_cvdayg7.pdfIn PDF document text
    • http://verification-help.com/best_certificate_design_templates_freevz1z2.pdfIn PDF document text
    • http://redirunna.xyz/what_is_the_recommended_tire_pressure_for_toyota_camrymqp8r.pdfIn PDF document text
    • http://creditinquiry.info/how_to_find_end_behavior_of_a_polynomial_functionbmf8g.pdfIn PDF document text
    • http://garant-ritual.online/tabla_de_integrales_indefinidas_o_inmediatastnobc.pdfIn PDF document text
    • http://3gusevshop.space/apostrophe_possessive_plural_worksheettd0fw.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/bc7fe2b0-2de2-47dd-af49-a789292fc2d2/xexojaze.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_7e364969ee1444ef913f2ea46ef1e298.pdf?index=trueIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_3ede5a22ed904e3f9acdb9aba6ddca95.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b074ae3a-5ec0-4239-83a4-31e1437dd1a8/xaxelefusokasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e4d9ed2-07a5-4cd2-a291-765d7e596d56/how_to_bypass_activation_lock_on_iphone_5s_without_apple_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0700a034-bbab-4d55-b3f9-3e535b5b1d9c/pathfinder_campaign_setting_inner_sea_poster_map_folio.pdfIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_f7d6dfd86fcc4202826c94fe5f36ae37.pdf?index=trueIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_a57149096a1d43f285adea70b65abbf6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/561a1c0a-87da-4c77-9a7f-4d9a604bf216/siwimot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7f0a49-cd18-4efe-9ded-a7179ceacd2f/hamilton_beach_easy-reach_convection_toaster_oven_6-slice.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_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 4984 bytes
SHA-256: 9ad19b3864b60a405af703dd3a4866723c9275a4b3dd545f9133889c3902a2e6
font_01_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 10504 bytes
SHA-256: 8234c547c734b97bcf3ea97847270c5979e14efd61bc59e9e0463f77082d6164
font_02_sfnt_off00012b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3