Malicious PDF — malware analysis report

Static analysis result for SHA-256 f700d08c20ed6d05…

MALICIOUS

PDF

74.4 KB Created: 2021-03-31 20:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dc985a57076b45c02123ebab7bced39 SHA-1: 7cbecb541879ef8ffc528165c3dd2409379ab77e SHA-256: f700d08c20ed6d05be0f05c72f5d9a7520b2599a54bc5b91c083bd16bdb18127
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially corrupted, suggests a lure related to a 'Benjamin Franklin aphorisms worksheet', indicating a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/123?utm_term=benjamin+franklin+aphorisms+worksheet
    • http://fefixanib.iblogger.org/hygroma_coude.pdf
    • https://static.s123-cdn-static.com/uploads/4452398/normal_5fcea4f83ef57.pdf
    • http://kobasobapina.22web.org/raise_a_hallelujah_chord_chart.pdf
    • http://vorazixugas.22web.org/sadness_and_sorrow_naruto_piano.pdf
    • https://cdn-cms.f-static.net/uploads/4504641/normal_602565d40c782.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6a2fdda4-31b5-4b52-be34-878e20cea358/dababiz.pdf
    • http://sanagubilisefuw.rf.gd/ragat.pdf
    • https://s3.amazonaws.com/jufowokedunod/siwukukavufubepenegadef.pdf
    • https://uploads.strikinglycdn.com/files/23b671f3-446f-49df-b6c7-0c7041288e3e/the_big_short_movie_character_summary.pdf
    • https://s3.amazonaws.com/matogapibelifiv/how_many_carbs_in_a_soft_taco_tortilla.pdf
    • https://s3.amazonaws.com/nezanurugega/whatsapp_status_video_length_limit.pdf
    • http://tomabev.rf.gd/69527809428.pdf
    • https://s3.amazonaws.com/zopenave/federal_trade_free_credit_report.pdf
    • https://s3.amazonaws.com/gewuwasi/churrascaria_plataforma_nyc_reviews.pdf
    • https://s3.amazonaws.com/xamibudasagas/goat_simulator_xbox_one_robot_goat.pdf
    • https://s3.amazonaws.com/mefadedosuw/simplicity_regent_parts_uk.pdf
    • http://monulaw.epizy.com/tizekorarotesuwolif.pdf
    • https://uploads.strikinglycdn.com/files/f89f8573-8d2c-4210-84df-f0693a759a88/excel_formula_if_cell_contains_number_then_add_another_cell.pdf
    • http://pavasokunise.epizy.com/beamng_drive_apk_android_oyun_club.pdf
    • https://s3.amazonaws.com/neporezofov/87617787719.pdf
    • http://meguwuzib.rf.gd/nawukifiwo.pdf
    • https://s3.amazonaws.com/badodemebo/abc_news_reporters_perth.pdf
    • https://s3.amazonaws.com/lulelepese/73414143243.pdf
    • http://punumakiwibase.rf.gd/diario_almirante_byrd.pdf
    • http://zivufev.rf.gd/how_do_i_reset_my_liftmaster_garage_door_keypad_without_the_enter_button.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_off0000e5d1.bin
a48785901bd2e6ca5d8a11e33af959ab8dfd25c742cefd4e24f708ab7d745308		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D1 5420 bytes
font_01_sfnt_off0000f82d.bin
16ce556556013190318f791aa68cc36c1ad3c6a2acc0fb5fd42a8a839f83c118		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 10276 bytes

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