Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb3bec11bc475ad…

MALICIOUS

PDF

93.1 KB Created: 2021-02-17 14:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: aacaa47bc8fa38ac4834eaa0f340377d SHA-1: 543259b161a2972def96fb82097141ca9bbecd5a SHA-256: 7bb3bec11bc475ada6c33f70e9c5f2eba55bf0b6c98772497fb37fc1caa2d633
136 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a domain associated with phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to printer maintenance, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/strik?utm_term=how+do+i+reset+my+xerox+toner+chip PDF link annotation
    • https://cdn.sqhk.co/lusoxepero/ghfmTie/76219526778.pdfIn PDF document text
    • http://nizuloxodiza.iblogger.org/bubba_the_love_sponge_podcast.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/crwgeCA/21288978473.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/hAXiigZ/shooter_movie_review_punjabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kixelekiteduxaz.rf.gd/sasiruwusisorezajobopizir.pdfIn PDF document text
    • http://dizutobasuxolom.epizy.com/netflix_android_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/prince_of_persia_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/avery_index_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/bandook_chalegi_song_djyoungster.pdfIn PDF document text
    • http://dopapaxejoj.epizy.com/44685469022.pdfIn PDF document text
    • http://rejeremonuwiz.rf.gd/addition_equation_and_conclusion_answers.pdfIn PDF document text
    • http://zepurudevivo.rf.gd/pixebatego.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/thiruvalluvar_university_bsc_computer_science_syllabus.pdfIn PDF document text
    • http://toxabose.epizy.com/rar_password_recovery.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012989.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12989 27120 bytes
SHA-256: fa3eb992e6095be5b53d27a655fe604f4e06780d76a14dbdfe0931dafc241b71
font_00_sfnt_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 5084 bytes
SHA-256: f57a3980590db20376a86c717e36a92b6e7ed2d3bc9fc2818ccb436e34fe1f46
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 11728 bytes
SHA-256: 90d92c48adca3593363dd6ef011fc64c86de61cb42da408f7d278df88703b05c
font_03_sfnt_off00015910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15910 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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