Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f63ea4c810222f…

MALICIOUS

PDF

76.3 KB Created: 2021-02-24 02:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6a6581246e2128ec8bfdd66f269a554a SHA-1: d2fa347e146e0b914c06e3b3fee29c813b8fc664 SHA-256: 67f63ea4c810222fedc963496fd78fa419b58ead9b6e9fb23c7fb0b4651d5992
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though truncated and obfuscated, contains text related to 'best online guitar lessons for free', which serves as a lure to direct users to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://leonvi.ru/strik?utm_term=best+online+guitar+lessons+for+free PDF link annotation
    • https://cdn.sqhk.co/mudinaxape/OVXhalO/begonepawefax.pdfIn PDF document text
    • http://titalat.iblogger.org/bannerman_road_primary_school_bristol_ofsted_report.pdfIn PDF document text
    • http://vutanari.22web.org/different_triangle_worksheet.pdfIn PDF document text
    • http://doordash.fun/vojitijb9z7v.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/jhcegeg/72401649627.pdfIn PDF document text
    • http://ukranews.icu/how_to_turn_off_razer_keyboard_lights_without_synapse06ru0.pdfIn PDF document text
    • http://c-advance.space/god_of_war_new_game_plusfwa0z.pdfIn PDF document text
    • https://cdn.sqhk.co/waxusuxagaki/ifjagfA/18073948856.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/idLm8hb/police_battle_simulator_epic_battle_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/cjfjfhb/wapurewigukafor.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/9jggi1V/cartoon_ringtones_for_free_iphone_6.pdfIn PDF document text
    • http://sendgrid-de.com/oster_food_processor_replacement_parts_fpstfp1355m9r29.pdfIn PDF document text
    • http://texewofe.22web.org/61007850806.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/YghUxhi/torn_acl_recovery_time_for_athletes.pdfIn PDF document text
    • http://topcreditcheck.info/atrial_fibrillation_ablation_guidelines_2017j6wlt.pdfIn PDF document text
    • http://mefizilexofe.66ghz.com/64050543890.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mikugux.rf.gd/understanding_bipolar_disorder.pdfIn PDF document text
    • http://sabuxixu.epizy.com/vopiradizakuxux.pdfIn PDF document text
    • http://ditinalozevid.epizy.com/budget_planning_worksheet_for_college_students.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 4984 bytes
SHA-256: cbad8dd75608d948ae2c5d5816590476354549d6992adc3c25fd52b3b2380722
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 10300 bytes
SHA-256: e3cb9ae8d86618fc5542be6c4144f5572926b032adbeed33523217fd839febf3

Open this report in the interactive analyzer, or submit your own file for analysis.