Malicious PDF — malware analysis report

Static analysis result for SHA-256 4688f756832dacf4…

MALICIOUS

PDF

109.2 KB Created: 2021-03-22 15:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 62cdabd4a76a932b268f6e99b94c61f1 SHA-1: 490c4f11251bef3182fff6a508e986bb1d37e430 SHA-256: 4688f756832dacf4afc93af4f3f5a6139cca0e0ab24614f2a74e0983830fdfad
116 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam by prompting the user to call a phone number. While no scripts were directly extracted, the presence of embedded URLs, particularly 'https://ponafet.ru/strik?utm_term=verizon+jetpack+6620l+user+guide', indicates a potential redirection or payload delivery mechanism, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/strik?utm_term=verizon+jetpack+6620l+user+guide PDF link annotation
    • https://cdn.sqhk.co/nuzozuni/RpW8hey/69049361503.pdfIn PDF document text
    • https://cdn.sqhk.co/nubenirosife/hctE5p2/mopivixowavepulapeter.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/ggjuiir/76583608917.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/hiCihgj/driving_zone_germany_mod_apk_1._18.pdfIn PDF document text
    • http://hdvideo.design/jimuzadhvd24.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/jd3jbge/rally_car_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/givujelised/g69jj0Q/48957452003.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/hXZ7jdN/black_friday_walmart_tv_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/miviluwulux/eCyjijd/nfl_games_today_schedule_2019.pdfIn PDF document text
    • http://kernig.pro/who_is_the_main_female_character_in_les_miserablesx5c6g.pdfIn PDF document text
    • http://feyakast.online/bear_whitetail_2_compound_bow_parts5uei1.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/L61jghe/20534665229.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuzodopuvu/uibWhd1/real_tiktok_followers_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/towojutal/bwgdWig/best_space_war_movies.pdfIn PDF document text
    • https://cdn.sqhk.co/gofejenizew/Ehfhcic/vijay_tv_serial_radha_krishna_ringtone_free_download.pdfIn PDF document text
    • http://fakaripeti.xyz/codycross_answers_group_4_puzzle_4reohk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najubu/43926383930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071c2153-6642-4b62-be2f-ada5c8f089e8/citizen_gn-4w-s_band.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/where_to_find_the_model_number_on_a_viking_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19b5e049-4ac5-484e-91ee-702aebc4cb50/explain_the_advantages_of_child_centered_approach_to_teaching_and_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3496b319-f29e-46fb-a9f4-a9c90e4b0399/disney_world_hours_january_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6707b810-d24f-46ca-9d07-19e9ef0f57de/captain_underpants_full_movie_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7d3ece-9986-4073-9655-0d0a19518284/jawefa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA4 5824 bytes
SHA-256: 96816974c2d762423fec349f5f820124993413a3027c8e438049805eff74befa
font_01_sfnt_off0001629b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1629B 12184 bytes
SHA-256: c85b98d261a1fd3992ff40aaf98638bfd73d9bc0c38f5611a615e3fd0ba03de6
font_02_sfnt_off00018bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BCC 18232 bytes
SHA-256: c6cf3b1e343c069f6b32643ec925c6f5a7dc7ea63f6213b1f4be8b253ae1456f