Malicious PDF — malware analysis report

Static analysis result for SHA-256 11bd062504a9b97e…

MALICIOUS

PDF

72.5 KB Created: 2021-03-22 07:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9176b7325b0c24ee33311b355e9241a SHA-1: d12ac9896d9aa2960bfe1de574348dfd14a98edf SHA-256: 11bd062504a9b97eb5d6d0e0c463c9287b265d96e6936d57ccf0a9eaa9f043f2
136 Risk Score

Malware Insights

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

The sample was classified as malicious by a machine learning model and ClamAV, with high confidence. Heuristics indicate it uses an advance-fee scam lure, typical of phishing documents. The embedded URL `https://nipisod.ru/strik?utm_term=python+programming+fundamentals+book` is likely part of the phishing infrastructure, aiming to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://nipisod.ru/strik?utm_term=python+programming+fundamentals+book
    • http://lazujifoxupa.getenjoyment.net/dukugubabodona.pdf
    • http://gukiduwonaxinef.getenjoyment.net/emotions_flashcards_esl.pdf
    • https://cdn-cms.f-static.net/uploads/4408002/normal_603b65a206b47.pdf
    • http://zazeteku.iblogger.org/74ls138_decoder_datasheet.pdf
    • https://cdn-cms.f-static.net/uploads/4453908/normal_60121abb68637.pdf
    • http://viseburigi.iblogger.org/ernest_hemingway_biography_summary.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bitizopovopaso/zaxaj.pdf
    • https://uploads.strikinglycdn.com/files/9747b418-4c61-4003-822f-445b09b87b28/is_super_mario_sunshine_on_3ds.pdf
    • https://uploads.strikinglycdn.com/files/707c2f99-cb88-413d-a0b2-30058a65d2d7/31097422414.pdf
    • https://uploads.strikinglycdn.com/files/82ef5741-bcc2-4671-9f4c-fa9595b9f17d/how_to_change_fan_speed_on_furnace.pdf
    • https://uploads.strikinglycdn.com/files/7a31e9ed-c920-439d-afae-9f19e4fcce2b/how_to_turn_on_bluetooth_motorola.pdf
    • http://tevisub.rf.gd/enthalpy_entropy_and_free_energy_calculations_answers.pdf
    • http://mowiwanafiv.epizy.com/31196663167.pdf
    • https://uploads.strikinglycdn.com/files/b63509c8-de03-4284-97f6-a1cef4ce34db/pimumetamefirusuvoveguk.pdf
    • https://uploads.strikinglycdn.com/files/fdb7c340-6b07-427b-bbf4-8d6b7a2b4735/romuletupavig.pdf
    • http://mavisozuwisob.epizy.com/does_samsung_galaxy_s9_work_with_straight_talk.pdf
    • https://s3.amazonaws.com/fajeloninesitel/game_tower_defence_king_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/3f739611-271f-4b12-a6e4-1bada5c025cd/88308092522.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_off0000dc3e.bin
ee959e2899ce97ae1affe6f72c279795a594fb0413ecba0ab63c3cff155a18d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 5760 bytes
font_01_sfnt_off0000efbf.bin
4ebbad1112bacbfc5f1f00c7b4b2b485d492196e576d05626d27ecfd22e45ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 10928 bytes

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