Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a04d92762096c2…

MALICIOUS

PDF

76.5 KB Created: 2021-03-23 18:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cde727ae369f706fd49fa214de022259 SHA-1: d0e551d295efc5d5e53abb72124543ef951c92cc SHA-256: 18a04d92762096c27621edd29315cfaffff7832ed5225daab12ef8ab3478826f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though heavily obfuscated, suggests a lure related to educational templates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=ppp+lesson+plan+template+doc
    • https://cdn.sqhk.co/retakabif/aJLTJir/missing_child_found_two_years_later_in_wall.pdf
    • https://cdn-cms.f-static.net/uploads/4460688/normal_6058c96cb703a.pdf
    • http://lazisirogabidir.mypressonline.com/diwejisof.pdf
    • https://cdn.sqhk.co/vetelojid/heiiLhb/10611396067.pdf
    • https://cdn.sqhk.co/mumaxifup/vGifBii/super_pinball_master_referral_code.pdf
    • https://cdn-cms.f-static.net/uploads/4379030/normal_60461f460a7ad.pdf
    • https://cdn-cms.f-static.net/uploads/4474752/normal_6009b4d2bdca8.pdf
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fde5be10a40c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/genijusemu/11304443494.pdf
    • https://s3.amazonaws.com/paxunu/63935971334.pdf
    • https://s3.amazonaws.com/kavalukato/starbucks_barista_pay_california.pdf
    • https://s3.amazonaws.com/tugumeb/combining_like_terms_practice_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/8668910e-d1d1-48c7-9516-3b4cf7dbb381/posasatuw.pdf
    • https://s3.amazonaws.com/wixanarer/pesitusakafe.pdf
    • https://uploads.strikinglycdn.com/files/b15179a9-121f-4f6e-8336-1f6d50fb625b/how_to_sign_up_to_test_covid_vaccine.pdf
    • https://s3.amazonaws.com/filidabut/jakks_pacific_spy_net_night_vision_goggles_stealth_infrared_binoculars.pdf
    • https://uploads.strikinglycdn.com/files/1e2940ef-5f50-4f1f-8bc8-3f5897dda3ec/releasing_emotional_patterns_with_essential_oils_book.pdf
    • http://tavoxelelenasi.onlinewebshop.net/active_listening_skills_for_adults.pdf
    • https://s3.amazonaws.com/vexosafugunu/wunotazufinivijaxotesax.pdf
    • https://s3.amazonaws.com/jokotaziweluge/behaviorally_based_interview_questions_answers.pdf
    • http://zaxuzut.atwebpages.com/3_branches_of_government_graphic_organizer.pdf
    • https://s3.amazonaws.com/lupebesu/christian_community_bible_catholic_pastoral_edition.pdf
    • https://uploads.strikinglycdn.com/files/e9a09d10-fc4c-4775-beba-89e6d2d22255/81732564989.pdf
    • https://s3.amazonaws.com/jeworurowam/61092939751.pdf
    • https://uploads.strikinglycdn.com/files/d00e48d3-ac03-4970-8d0b-03bde6a8be7b/what_is_social_in_geography.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_off0000edf4.bin
20dedc6d95f69040a3480371705a7b8e23d28c298a4526a6fef15e1d7f238917		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF4 5124 bytes
font_01_sfnt_off0000ff4d.bin
83f831c7d84bf89a6b08afc4e455d7d0a9cc7023b4e1296bdc42afcdeaff71ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4D 10880 bytes

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