Malicious PDF — malware analysis report

Static analysis result for SHA-256 4570ca7855411e0e…

MALICIOUS

PDF

71.4 KB Created: 2020-12-19 13:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: aac196b8b8c28bdc9c2997b741a5850a SHA-1: 236634e4739598e73287b474e5fe2fd8c0d8ff07 SHA-256: 4570ca7855411e0eb493ca6326d5c70b5ac96d1febdb18e3bfbf64b31a3db869
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 0.9995

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://trafffe.ru/aws?utm_term=acetic+anhydride+enthalpy+of+formation PDF link annotation
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/babigesiwonep-bolug.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/dd87a4f283f118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5fc7412b5e2a6.pdfIn PDF document text
    • https://bupefozatige.weebly.com/uploads/1/3/4/3/134384552/82a4819a844287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fd3d3430e3aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/826ac770-7425-4cab-a32e-4741159a6c69/99895037876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceab3d40-be8d-4503-b4ba-7c78d55d8112/35698027484.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe5fe2e18c5c478ecb318a/1606311910604/angel_of_death_womens_costume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d3e9f7-bb5f-433a-ad16-2dcc5280b177/55377682639.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc826ac3cfda2dcf0aa550/t/5fdcbf305fd8956ebac0cc0e/1608302386088/livery_template_of_komban.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDED 5308 bytes
SHA-256: 0ef9fbb524c73a195dda2a2109736b26e06455a91810c81c9f78b35a6f42950c
font_01_sfnt_off0000cfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE3 13028 bytes
SHA-256: 703ffb1d58a5025b6f6bae7059a706f0125826dff5ba117f1a8c4d47d04dfc85
font_02_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f