Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e61db090ab31d9…

MALICIOUS

PDF

88.9 KB Created: 2020-12-16 01:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a6df5e8e5e2ec98a4c857fc156525771 SHA-1: 1207d46e51e5e2a39d8b5fc982fd593cab79b287 SHA-256: 20e61db090ab31d96d7877c122aebe01be7c03a05e0ab8a3d901fe36fdcd9132
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://traffnew.ru/123?utm_term=general+chemistry+unit+8+worksheet+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5f9b0cabb0341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fd650afde8af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fd3dac15b2d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f9a5df559cfd.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/zafaronivaj/55994517023.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/75268975885.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c9b1a5bc066edfa528b7/t/5fc1625a3f75b16643083ccc/1606509146547/chow_mein_vs_chop_suey_vs_lo_mein.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10620bf71053ccb10dd13/t/5fc3642a3570fb44d16e7f18/1606640684967/everquest_hot_zones_by_level.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a839be9b69395132fc47/t/5fd6d74f226e9048fac8b0af/1607915349189/zobuxavixejipopibifofab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a88b8787e879898c667c/t/5fd71e413ebe0416317866de/1607933507124/lisezolojudaduposozubuz.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/bancassurance_notes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cbc6bdb33045eedb2023/t/5fd607d5e5ac582896185021/1607862230120/teamviewer_answer_file.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_off0000f081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF081 13184 bytes
SHA-256: a33caee7fdf8ca228c7618a5d89647df5903c633a25648774770f61466b5ded5
font_01_sfnt_off00011b06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B06 5688 bytes
SHA-256: 802511827201985b92c29945f6950002dcc6a285a72918a0851a690f6b8ddfbc
font_02_sfnt_off00012e51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E51 11800 bytes
SHA-256: 6fd7e6c28025e06e373b2b58a30dd08a1b1660edb9bcb7e5910f78b969425daa

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