Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f403df8619ce9de…

MALICIOUS

PDF

85.9 KB Created: 2021-03-14 09:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1abea91db2ff826c21c376d32fb3e08 SHA-1: ea315ffce172c4f9e29cb18d03bcdeef833c8e9d SHA-256: 2f403df8619ce9de3ff3cebc33b7fdfc2eb60cd7fa8ce4e61818dbbc7abf94df
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may also be used to trick users into providing passwords for encrypted archives, a common tactic for evading gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO spam or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jacksth.ru/wix?keyword=boat+trailer+guide+pole+pad+and+cover
    • https://siwurarililoto.weebly.com/uploads/1/3/1/4/131453181/2827891.pdf
    • https://tunilawogipafex.weebly.com/uploads/1/3/2/8/132814387/woxetarirupoxevagaxi.pdf
    • https://cdn.sqhk.co/jijatidos/fBThejf/sudoku_solver_app_download.pdf
    • https://widonudafedezu.weebly.com/uploads/1/3/0/7/130776490/lilure.pdf
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/6875544.pdf
    • https://vitigamonewus.weebly.com/uploads/1/3/1/4/131406732/5824776.pdf
    • https://jovegubegatok.weebly.com/uploads/1/3/5/3/135318826/406ea1a9.pdf
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/fududepitoxo_fenatopod_datuji.pdf
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/5076551.pdf
    • http://soxezujep.iblogger.org/pebojadimemasuduji.pdf
    • http://rodigevofu.iblogger.org/nidet.pdf
    • https://cdn.sqhk.co/gidufulelav/1VBY8iL/idle_heroes_private_server_hack_download.pdf
    • https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/4bf190132.pdf
    • https://cdn.sqhk.co/vizelupavew/h5igdjj/bouncing_balls_game_sheppard_software.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ad80124a-3a41-405f-bccb-2c648a215490/konica_minolta_c224e_default_administrator_password.pdf
    • http://tosaxope.rf.gd/blomberg_dishwasher_manual_reset.pdf
    • http://parubupo.epizy.com/mobil_balap_games_free.pdf
    • http://galefawanakujum.rf.gd/tusanokagivulozemaja.pdf
    • http://zutosagu.rf.gd/what_is_baby_poop_called.pdf
    • https://uploads.strikinglycdn.com/files/b1f3b721-a9c1-4d36-a0f0-64f1e912e033/why_does_daphnia_heart_rate_increase_with_caffeine.pdf
    • http://zopatirek.epizy.com/bharata_simha_reddy_telugu_movie.pdf
    • https://uploads.strikinglycdn.com/files/1a159751-8923-401e-8113-08ce5267da6c/how_to_use_commercial_electric_voltage_tester.pdf
    • http://xifedesekelogu.epizy.com/dremel_1800_scroll_saw_manual.pdf
    • https://uploads.strikinglycdn.com/files/50733f20-a196-486d-91cf-0c7d8012b937/how_much_is_a_case_of_premier_protein_at_costco.pdf
    • http://duwufinojitu.rf.gd/81030639669.pdf
    • http://tunufefenus.rf.gd/59002461606.pdf
    • https://uploads.strikinglycdn.com/files/b0b842ec-59c2-4feb-b70f-a7303b67021d/how_to_reset_a_schlage_sense_lock.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_off000111b6.bin
46bd5c7c01fddf40bfc729ab97ab0b655d0d5084d664e03156ec04de71b4a357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111B6 5172 bytes
font_01_sfnt_off00012366.bin
39c6574169e57b115d536c2e6638be4755b5919dbc22faee1e8f4cc2606f2ecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 11252 bytes

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