Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0cf90a069ac6a0…

MALICIOUS

PDF

76.5 KB Created: 2021-03-23 17:37:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5697699e62b6172874ccc5d52bfff5d1 SHA-1: f4f101a6dcd5bc23169bf1256747049c1498afe7 SHA-256: ec0cf90a069ac6a0c1ca5ecefdafd8e56bf63a5989469b11ce77db6f7610d92e
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document employs social engineering tactics by impersonating a software update or fix for 'Foxit reader not working ubuntu'. It contains numerous links, including a suspicious URL to 'dugedepap.ru', likely intended to lead the user to download malicious software or provide credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://dugedepap.ru/strik?utm_term=foxit+reader+not+working+ubuntu PDF link annotation
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/4f825b7f27a4.pdfIn PDF document text
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/jukupabowaroziga.pdfIn PDF document text
    • http://farvestnn.ru/kenmore_elite_dryer_parts_edmontone6eys.pdfIn PDF document text
    • http://uplrezina.site/ib_binomial_expansion_questions_and_answers2ht0l.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/soxiserorp8qcf.pdfIn PDF document text
    • http://profyhouse.ru/effluent_regulatory_reporting_information_systemu8szz.pdfIn PDF document text
    • http://tonagruz.ru/saxasevoririke523i3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_e5f95782579948d4931027b9ff5cd4ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4baf6a-1053-4ef8-9022-9884eae1d44d/vinsanity_shred_ripped_in_90_days.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_1429ebf945024565b8f26d1486e56b2d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa0654d-6886-4a3a-86cb-370564688f34/73606067366.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/54239669636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3cd7c0-4012-40c4-ab12-3842f44b552e/teaching_english_grammar_scrivener.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/photosynthesis_limiting_factors_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f864817c-b46d-4846-b336-7a0385776dd2/how_to_analyze_peoples_personality.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/netunexulija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1b13fb-9517-46a7-a826-b771aa20caa6/zisaxasoboj.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_5f024c4d3d5b49c8a2a32a3e7e99dbe0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/star_trek_discovery_season_2_dvd_release_date_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/table_reservation_form_html_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58da979c-94b1-45eb-8ec8-6925aa020370/88777109592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/122df34e-ee4b-4d25-96f8-3a10b52b94c3/kenmore_washer_repairs.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_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 5104 bytes
SHA-256: 0ede498ed5b4a26333264b2a329e922ded3e32b5ba0e031567c895262452b55b
font_01_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 11084 bytes
SHA-256: ddc370f730d7a6e8f41233ca26fd6966092549fbe68bd4c888dc3ea48c2c4209

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