Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85365c0ac236a2c…

MALICIOUS

PDF

80.0 KB Created: 2021-01-03 07:43:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8a11f0ab2c42c5ec9296b0212ab60a2f SHA-1: 83ff778ef5cc4c4755cfeb6872f09403d8114e29 SHA-256: e85365c0ac236a2ccb6851eb4fcdd766505af18770af8820cf888789c55bd1f3
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 0.9997

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=buscando+a+alaska+pdf+libro+completo+descargar PDF link annotation
    • https://cdn.sqhk.co/rogapakaler/eKihgjK/44565254806.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/kibavutibeved/munolitaworupasaraxizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd17d9a-98af-4123-8c97-d9382cd6f5f1/rubijodinizevasipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20eb308c-eb7e-45fd-a2a1-8e43a0d6da49/judge_judy_download_episode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e09486-21d3-4189-a5d3-262b5cfa5efb/20383188448.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/miura_boiler_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1db6a29-4b44-466c-b9fe-22610ff0883b/mr_lunt_call_the_midwife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c47620d-86c2-400e-a0e8-626df0307bdd/voxusuruporufanujob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ef0c46-fdde-4706-a0e6-23c48632f0fa/fezejerolagomir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8332bcdf-31f6-45f1-8804-2b0e132fd2cf/32608970080.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/fb_video_er_hd_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa2b5e5-8428-43a5-bad1-844ae5cea41e/ninagasotubowapuvasu.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_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 5728 bytes
SHA-256: 696387d48e4d7c3e7dd35af8e674de529ddbd81320c15d07ee7dee77d1d508f1
font_01_sfnt_off00010c0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0C 11536 bytes
SHA-256: 6a903f30ad496a51247b504a1f40482d404d17af9aaa3c93dc89e20786bb5882