Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2db4092a5f9b23f…

MALICIOUS

PDF

79.4 KB Created: 2021-05-07 18:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7472c0c1b5c818feeace7a0b167974cf SHA-1: dc1cd862d6c2aaafcbd3bf15eb01b5ef8e6bbcb1 SHA-256: a2db4092a5f9b23ff1f3ac98f7ccd35c61c587d8d139a7c179db1132ff89980b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ML classifiers and ClamAV as malicious. It presents a fake CAPTCHA, a common social engineering tactic to lure users into interacting with malicious content. The document contains multiple embedded URLs, one of which, https://dafemum.ru/strik?utm_term=the+endless+summer+ii+soundtrack, is directly associated with a heuristic firing for an external URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://dafemum.ru/strik?utm_term=the+endless+summer+ii+soundtrack
    • http://rivilezuzidewux.iblogger.org/balanceamento_exercicios_resolvidos.pdf
    • http://prizinsta365.website/why_is_gluten_free_food_bad_for_youe0r73.pdf
    • http://vienvozvrat.site/john_deere_316_parts_manual1u24b.pdf
    • http://sportita.fun/oneplus_nord_gadgets_360_ratingpyuk5.pdf
    • http://suzupuwejal.mygamesonline.org/1067340450.pdf
    • http://razvivatel.blog/spermacoce_hispidafi4mi.pdf
    • http://zuxegizo.iblogger.org/cevdet_bey_ve_oullar_yandex.pdf
    • http://beritox.medianewsonline.com/84106464425.pdf
    • http://cmbmarketing.agency/finuduwitotixukopigaxekiksyql.pdf
    • http://daating19.site/can_you_record_live_tv_with_apple_tvtrtr1.pdf
    • http://oyuncuxx.com/82701154233cbgcb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b977b0d2-ff31-468c-b52c-17f90257b764/camp_chef_pellet_smoker_steak_recipes.pdf
    • http://zatojigetafugud.epizy.com/diabetes_guidelines_2019_flowchart.pdf
    • https://uploads.strikinglycdn.com/files/5e5471ab-477a-4c53-8634-11f84dc02146/third_grade_math_worksheets_multiplication_division.pdf
    • http://jemudizibumak.epizy.com/boeing_737_800_aircraft_maintenance_manual.pdf
    • https://uploads.strikinglycdn.com/files/35e41b6d-9fb6-4732-8a7c-c13aa6c01921/john_deere_d140_air_filter_part_number.pdf
    • http://gobipubefosoja.epizy.com/96685826497.pdf
    • https://s3.amazonaws.com/jarirotexab/how_to_learn_software_testing_at_home.pdf
    • http://weponigonimogo.myartsonline.com/biology_lab_manual_class_11.pdf
    • https://s3.amazonaws.com/nerugiraxura/what_is_a_observational_documentary.pdf
    • https://uploads.strikinglycdn.com/files/5e6824d3-0716-4a2b-a197-affbb61ffb41/how_much_does_an_occupational_health_and_safety_officer_earn.pdf
    • https://uploads.strikinglycdn.com/files/86dde0b3-6bf1-428a-a6fe-8004cc0980e4/rupixutenarofuvopusado.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_off0000f5bf.bin
998722fea533b6719a58cccba0dddef375a8b69e4a692223076a6c216a58d60a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 5192 bytes
font_01_sfnt_off00010737.bin
d47c44d0812693abccbaf4dd242328a209aa93e441a697475373cf9ef02a6f95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 11996 bytes

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