Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6d305042a657e9…

MALICIOUS

PDF

77.4 KB Created: 2021-06-04 13:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7e57feb30602d5bc032eef80e2ad440b SHA-1: 613738eb277271dbcbf298dd333563cb8dc38822 SHA-256: 4d6d305042a657e9f9721b2b05abc4f57ceee33fa767c2f5a840248ad75a548b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to 'lesson of August questions and answers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/pbw?utm_term=la+lecci%25C3%25B3n+de+august+preguntas+y+respuestas PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4374859/normal_60b6e6fe2e643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_6032e3ee8aa1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527902/normal_60007f01af1d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b62280c4-3480-405d-99ab-0cd577eb97b9/dovosodamoginijatew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea04c29-535f-4038-bed2-71dcdd227cab/serum_serial_number_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498db37d-12aa-4409-ad9e-e21e2fe4f033/old_school_rap_songs_80s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81fbabda-a512-4c80-8a23-d85e1bce6ee6/jiwofoxusifukinesalutok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04136fb1-65c4-4d4f-8f01-e558e9799bbd/79543054159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81542a5-1d35-47aa-bbdd-7fc7e5991894/life_of_pi_discussion_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b07836-715d-4bbe-a14e-4c4657e4e30b/mango_street_book_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8653979-d5d2-4418-b006-692abdbe7d9c/how_to_play_microsoft_flight_simulator_2020_multiplayer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b7567b-6ae4-4107-baa7-b4ef9f124631/bexufanonomudizofiwejel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b12a7c6-77a5-428f-9c92-f51e157c104d/internal_combustion_engine_fundamentals_2e_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c611b45-d11e-45dc-a4d8-ac6b2582301b/ratios_and_rates_worksheet_answer_key_math_aids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b86a99e-4b81-40a1-b341-a5c581750d0d/51421114017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c87878a-b598-4e2e-ad03-0295835501fc/tableau_edit_bookmark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d6c8ba-9718-4ec6-b744-f581d93d4ee2/71402061288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fda527b-81e6-49ea-8766-6b7333db9223/rising_of_the_shield_hero_does_naofumi_and_raphtalia_kiss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3926b76e-3aab-4cc6-b122-02fed9299fbe/what_does_the_tree_of_life_movie_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8d3944-e3f2-4cba-8bb2-0272f92b7836/devozizawudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7085d58-025e-479e-b159-e5849cfbee1f/26373654017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f393c13-c318-4c25-a869-799a6f999e55/25095197489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b955e8dd-1922-4004-9994-7b1c5279e0f4/negewaluzod.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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5420 bytes
SHA-256: 317d9a02909048d63b171084c429101932be348d9258a8910ddd58bd368aa85d
font_01_sfnt_off0000fffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 11424 bytes
SHA-256: c91543c2b15ef2740cc78a3edfedf4f92d126545f2b372ea122af99d53642cc4