Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf3120311aeb93d…

MALICIOUS

PDF

91.7 KB Created: 2021-02-24 20:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec788b3ac420ce1bd1ec008d68393c8c SHA-1: fe94f6443354a1f60c8580709e4b0279a109014a SHA-256: acf3120311aeb93d38db7f0c54f941b82e9d5f720a945a89943561be96283a6a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=binary+compounds+examples PDF link annotation
    • http://centerbluebadge.com/81868366072aa527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490929/normal_5fd916c174880.pdfIn PDF document text
    • http://lidlid.xyz/o2_answerphone_offsf62y.pdfIn PDF document text
    • http://hristogrigorov.com/kawaxujuvorepinodeg852sj.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/ShdYYb4/live_groups_katana.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/Pgegcic/lumino_city_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/iejidwX/bloons_td_5_apk_3._26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/78077126578.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/game_alien_shooter_mod_money.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/aflac_group_hospital_indemnity_wellness_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/sex_and_the_city_2_movie_online.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_off0001278c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278C 5440 bytes
SHA-256: 82d4b7d90ac56c9793ce9203548d7a94b485d090abb713ff4c69e2bca8b041cb
font_01_sfnt_off00013a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A03 12036 bytes
SHA-256: b38c742c7497200ab87c6ce52745dc2ee70c18ba8025fd088af57f72d5b2f20f

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