Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ad4f8c6018efd0…

MALICIOUS

PDF

82.4 KB Created: 2021-05-01 20:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7fb59d74f65a8bdec2cc52058cf5c79f SHA-1: ebef0802d39d8c90d731cd8ea3cc2973a24c0a97 SHA-256: 61ad4f8c6018efd0cc57c58d50b4827552a314438cda58dfd30a7afacc28ab32
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'gimoguvi.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to driver's test study material, aiming to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://gimoguvi.ru/strik?utm_term=what+should+i+study+for+my+drivers+test PDF link annotation
    • http://laxana.ru/free_editable_calendar_2019_template428gw.pdfIn PDF document text
    • http://luminar2-download.xyz/how_to_block_a_number_on_a_consumer_cellular_flip_phone9dlz6.pdfIn PDF document text
    • http://pitushok.space/angular_file_from_s3b1yqc.pdfIn PDF document text
    • http://chtotakoevuxom.biz/how_many_calories_in_el_pollo_loco_classic_chicken_burritom02t5.pdfIn PDF document text
    • http://3-bureaureport.info/casio_erkek_kol_saati_cas.ga-100-1a1drzpy3t.pdfIn PDF document text
    • http://jewlgems.com/81981885835lgugo.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/2006_chevrolet_malibu_ss_0-60.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/easy_disney_piano_songs_free_sheet_musiczeevj.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/27799961183.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/dd42e44f-b6b7-45de-aa87-fd5c4e1b0e1d/roland_d50_software_synthesizer.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/how_to_use_a_stamina_rowing_machine_properly.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/99186475414.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/girlfriends_guide_to_divorce_jo_pregnant.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/tsa_arrival_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/delta_shopmaster_sliding_miter_saw_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3758e4a7-9b87-48ac-b702-fb5a33f0f902/bilowo.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/foduwuridijetalo.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/39579690587.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/aircraft_maintenance_engineer_salary_in_indigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4220533d-39fc-4bec-aa19-1483e14a8337/what_is_climate_change_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407805c1-c5b4-44b4-bf9b-4d427be9d651/31135403070.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/1611_king_james_bible_with_apocrypha.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/cron_schedule_format_in_unix.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_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 5100 bytes
SHA-256: c7c100f3b5a9647d4e06d3e539785eb93f18036e26fa7c1d006ba39b08114b12
font_01_sfnt_off00010807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10807 11176 bytes
SHA-256: df82f6db040c8d39f909c13ef8b7ca7e9926be3382c2bde3faeb1c9f81c4f8fa
font_02_sfnt_off00012ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DED 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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