Malicious PDF — malware analysis report

Static analysis result for SHA-256 404bd8f8ad3bcffe…

MALICIOUS

PDF

75.7 KB Created: 2020-12-20 13:03:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f6b962a4a1a83b23016de38ca4a9fb6a SHA-1: 90cbdf782ee9180a5053275492dca4cb262de76f SHA-256: 404bd8f8ad3bcffe15f25a2e3d37e0c979ec9d78f96bb8c2123b0472d9c6b157
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://traffset.ru/123?utm_term=prism+cylinder+volume+worksheet PDF link annotation
    • https://ruxapumuful.weebly.com/uploads/1/3/4/6/134682584/fenujewozekavaz.pdfIn PDF document text
    • https://luzuredero.weebly.com/uploads/1/3/4/0/134016924/varejajebadadilukipu.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/xufumiwebi_dazamuxeguwut.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/mizeteb/the_heritage_of_world_civilizations_volume_1.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdea5af16e5f16f9482448/t/5fd22ed51693665fc7dba098/1607610069354/38814459180.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/tolimujidurebavix.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/7041846639.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/18038642967.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/balidan_bengali_movie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcef12d9697205d6f6633f7/t/5fd697095b1f6f7539df9374/1607898891455/beginning_fingerstyle_guitar.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/cripple_and_the_starfish.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85D 3120 bytes
SHA-256: 750d1396ea0bf5fbbfb1efa7800930e25a2e400cebbc542b316d66b1e2c172b3
font_01_sfnt_off0000d392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 5288 bytes
SHA-256: a465376f798c4d0fff039c20b73c661457f5fa1c1022677e3c3f819a42e49ebb
font_02_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 12328 bytes
SHA-256: 664a341ae970cf9b5f981446fead6d84175565e0df8ae404d532f4abebb34257
font_03_sfnt_off00010cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 16060 bytes
SHA-256: 8f676b3be356e2086f34f7c81dd3575184be90372cbe0b4aaba7ba30be3377d2

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