Malicious PDF — malware analysis report

Static analysis result for SHA-256 6972297133203352…

MALICIOUS

PDF

87.2 KB Created: 2021-03-28 20:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1d1bd6acb45312b94f5da46175a9098e SHA-1: e30a343242da754f99a37126bf4644ecc4fb3f75 SHA-256: 6972297133203352cc33994fc8b168512bf4698ebb36d088e18738a59b678528
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing, with one prominent link pointing to 'ponafet.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://ponafet.ru/award?keyword=adding+and+subtracting+integers+rules+pdf PDF link annotation
    • https://zufezoro.weebly.com/uploads/1/3/4/8/134885884/nimunovadexowe.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/gzhfRBg/ninja_slice_fruit_master_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mumoragato/jhehijb/hayes_secondary_school_ofsted_report.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/gIhO8xZ/92645173928.pdfIn PDF document text
    • https://tejukazirinari.weebly.com/uploads/1/3/1/3/131398521/287574.pdfIn PDF document text
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/5513208.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/jirupo.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/g0kgjii/pen_and_paper_rpg_database.pdfIn PDF document text
    • https://cdn.sqhk.co/xadelakora/jijigKk/lebara_top_up_plans_sms_code.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/ieShjji/smooth_action_cam_slowmo_download.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/4472e076-d36c-4705-b002-e21cd4e72fdf/85437059655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15378c0-a2b6-4c6c-85eb-8d6f9fa47552/the_soul_collector_2020_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/38175230361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/337b16f2-0356-4eee-8a7f-c74e80baeb3f/lexifatuvusarexalutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3710ffe3-631e-45ad-880b-2d30efa32a05/what_is_the_healthiest_food_to_eat_at_burger_king.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429ad915-d4fb-4317-a1bc-388b59f3892c/fejijifolokogeropo.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/balloon_tamil_horror_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f296c074-c502-4407-a760-fe77b2645a64/najozopunaloburapitej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5cc3481-d347-4d24-a2b0-3adc1589b6ba/sukedibagolamevit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca6c9fe-efd9-4f9d-8fe5-1e03f18ed644/big_fish_audio_and_vip_loops_-_swagg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f2cefe-fa86-4d0f-bbc5-4482e1293371/sentence_building_worksheets_for_third_grade.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42A 5224 bytes
SHA-256: 404115ea423d884fdd7ba9532ac7b333696af2e4706e38423e56224ac849e817
font_01_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 11032 bytes
SHA-256: 63d2384e211f78dbf835ae60b5bf1dcef6d9864224551af6103960ee99edcbd8
font_02_sfnt_off00012be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2
font_03_sfnt_off000140ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361