Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e16ba03e740ac18…

MALICIOUS

PDF

66.2 KB Created: 2020-12-21 22:35:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 91ea94750d304f5ac0cd3ff98e011155 SHA-1: 8ff8a137e192b2f0f1e93e43d41e14539524ce31 SHA-256: 4e16ba03e740ac18835fc8658f99668805fee9438af2fb16ffe56a98394623b0
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://traffine.ru/strik?utm_term=sword+art+online+2+iphone+wallpaper PDF link annotation
    • https://guxikotazo.weebly.com/uploads/1/3/4/7/134704652/3582684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5f8d07d8979f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5fbbd44a8b101.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/5985534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5fb594e980628.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/pazerogasarinu/burlington_township_schools_calendar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1f4a36-e2e1-46c5-b2da-a5724bdaaabf/jigojawofesad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cebca35-73d8-425e-bbab-22b2517f973f/sekejutow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9c063f4cf67099f9b1f3/t/5fd66754226e9048fab740da/1607886680815/vediporitedodiwinibob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c674304-5929-44e6-9d1a-5b4da2344adf/retofiromopokoturu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf525ef8cdb769c6d97870/1606373983105/zuvuduwimawi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB925 3380 bytes
SHA-256: 2ef0727fa4c27f5e22fe02a927f7d864943399665c981ee05c22561396c1548a
font_01_sfnt_off0000c544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC544 5196 bytes
SHA-256: 46265255fd1286b189775bd35ba84bc2f9b6a63ea9a2bb53af8b6b29d46c2d49
font_02_sfnt_off0000d6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 10952 bytes
SHA-256: 6a8a0a22916391a68d743a0ea8d2c2c9e21856d8f6a35c238ccb4f0cab6a60e2