Malicious PDF — malware analysis report

Static analysis result for SHA-256 100cef3b4892698b…

MALICIOUS

PDF

86.2 KB Created: 2021-01-14 03:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8cb9c69ddb3823c83ef0ad880788cca9 SHA-1: 12e0d68db6f805b6aa396bae0646e42f58f26bce SHA-256: 100cef3b4892698b704bab04db5212f35f26236a176a85263f12f573b2484960
96 Risk Score

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 0.9998

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://trafficel.ru/123?utm_term=generacion+del+98+temas PDF link annotation
    • https://site-1171725.mozfiles.com/files/1171725/assistive_touch_untuk_android_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_5fd90fdb3b056.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/hbljfMi/airbnb_near_me_with_pool_and_hot_tub.pdfIn PDF document text
    • https://site-1171953.mozfiles.com/files/1171953/gartner_inc_fort_myers_florida.pdfIn PDF document text
    • https://site-1174103.mozfiles.com/files/1174103/block_story_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fcf7bfa7182f.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/YA3mjjN/teach_online_courses_jobs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5fa56fc61b403.pdfIn PDF document text
    • https://site-1177931.mozfiles.com/files/1177931/vumamazibix.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/feliso/23315288782.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/givosak.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/we_go_together_grease_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/film_director_riefenstahl.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/92122493729.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/number_theory_books_by_indian_authors.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_off0001114e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 5464 bytes
SHA-256: ef41979c612eb13479f5d7f18d8f446948bd637aa50c26d3e1c6d3c8c8dbcd73
font_01_sfnt_off000123ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CA 11848 bytes
SHA-256: b9e5fb94baa421cedbf647bc9801e47d4e784753c4aac27e740a2cc2fadeee52