Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b4be18a67266a8…

MALICIOUS

PDF

68.0 KB Created: 2021-02-08 05:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bf86a81473f9f95654f220af70beed1e SHA-1: dba76b74200d399e9c151fad3c7a4e0291e34807 SHA-256: 57b4be18a67266a8355c9c1f49b1fa9baeabe8b36a86dce0ba4fe68396de635f
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL and the document body suggest a social engineering lure related to audiobook search results, likely intended to trick the user into downloading a payload. No scripts were extracted, but the PDF structure and external URL indicate a phishing attempt.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=the%20alchemist%20audiobook%20free%20%20jeremy%20irons PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501495/normal_60021f0bdb910.pdfIn PDF document text
    • http://allerop.xyz/gazugevujajikevelonevm2czu.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/heChhhf/hot_wheels_race_off_ps4.pdfIn PDF document text
    • http://shtancircul.site/madinah_arabic_reader_book_8_free_download2u8t0.pdfIn PDF document text
    • http://kvyovk.xyz/mizuno_aerolite_micro_vi_stand_bag_2015sjx63.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/3jajg0C/nail_salon_in_the_mall_hours.pdfIn PDF document text
    • http://winfreeiphone.xyz/lego_marvel_super_heroes_2_deluxe_edition_pcofxzh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dosunadis.epizy.com/bifesta_bright_up_cleansing_sheet_review.pdfIn PDF document text
    • http://bagegamejejupu.epizy.com/happy_birthday_daddy_song_pagalworld.pdfIn PDF document text
    • http://bavodokebak.rf.gd/lijojogaf.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/ottawa_police_collision_reporting_center.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/faxojilaxibelofaleguvisu.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/fovufikilosuzixemewagipi.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/avengers_4k_wallpaper.pdfIn PDF document text
    • http://kixelekiteduxaz.rf.gd/uc_browser_latest_apk_uptodown.pdfIn PDF document text
    • http://nukuzuxowilaz.epizy.com/ocean_basket_menu_2019.pdfIn PDF document text
    • http://nolivajujereram.rf.gd/13607662905.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_off0000cc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8A 5592 bytes
SHA-256: 2a24b67f10b3fd9608e1654ddec46f87d8b47f8b9acae138d5fe148dc0ad7e0b
font_01_sfnt_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 10392 bytes
SHA-256: d30f44a5aaefa6c3a7506669c142f53f029f1ed7fe438ca808143a7b3505b84d

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