Malicious PDF — malware analysis report

Static analysis result for SHA-256 729b318b73bee6e7…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 17:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cab31015584f92ffbfbec3052f967855 SHA-1: 7afae920ef213b74b38ac8e016541e8861275779 SHA-256: 729b318b73bee6e79be3a6fb1308a92ba1d81a2edbd610724ba7bdc1efc0781c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. The embedded URL points to a suspicious domain, and the document body, though heavily obfuscated, suggests a lure related to a 'Lewis and Clark webquest'. The presence of an external URI heuristic further supports the malicious intent of directing the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/wix?keyword=lewis+and+clark+webquest+4th+grade
    • http://naturapple.space/916407864569ntj0.pdf
    • http://carins.info/26797320868hmurf.pdf
    • http://organicsss.space/sudorunirodixifenazekcsps.pdf
    • http://vezdesami.ru/android_x86_vmware_resolutionuccg2.pdf
    • https://cdn.sqhk.co/wularumijif/TQBgghb/98918643440.pdf
    • http://cmb-accueil.com/language_a_reader_for_writers4t0xy.pdf
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdf
    • http://relax35.ru/oscar_schmidt_autoharp_serial_number_databasev48fl.pdf
    • https://cdn.sqhk.co/bulixanejad/3aphbgg/pixel_gun_mobile_shooter_apk.pdf
    • https://cdn.sqhk.co/josurowelimu/ISZaXgg/wisconsin_national_and_state_parks_near_me.pdf
    • https://cdn.sqhk.co/livefivepa/dC2hQeH/crunchyroll_store_one_piece.pdf
    • http://tells.fun/yamaha_g1_baby_grand_piano_review1a80m.pdf
    • http://whitecheat.xyz/nifokamepugenuwikyxus.pdf
    • http://profaudit32.ru/bezubaan_kabse_song_pagalworld6z1q1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_7dd8f9353b294335a83316b1a278b5bc.pdf?index=true
    • https://s3.amazonaws.com/defujo/example_apa_format_annotated_bibliography.pdf
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_abbf8ab298034eb08226f7e182a23e56.pdf?index=true
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_0b1ec3c09e9949e2bb6a7d87d9891d7f.pdf?index=true
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_a962a24ce92c4fbd8c40e64cd44421a5.pdf?index=true
    • https://s3.amazonaws.com/tigovatolis/xisulibix.pdf
    • https://s3.amazonaws.com/vibasujefir/leadership_skills_test_questions.pdf
    • https://s3.amazonaws.com/xakajoziwibi/pitoxusojeniluzetare.pdf
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_22cc2c679e62448caa13d115ea949b6f.pdf?index=true
    • 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_off0000e569.bin
64ad4f60e29572c3dec9b457ff2923e90b140dd404babe9e94447c3460ffbd37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE569 5652 bytes
font_01_sfnt_off0000f8b1.bin
154dcf64055ad42b6f8e6bc0a496219029f6bd3e2f2ec0f049539190f28b9285		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B1 11152 bytes

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