Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9200badf8750cd4…

MALICIOUS

PDF

77.2 KB Created: 2021-06-06 04:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fd6195077db97e9ca1678d2c1ec57f2 SHA-1: 6fc2d91871eff2662476b9c88f3e07703fae1bad SHA-256: f9200badf8750cd4ee1fe0482314ee7f316e646e40e666a979d4e182a2a60185
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that likely leads to a malicious download, indicated by the 'gmail drive for windows 8' lure in the URL and the document body. The PDF structure and embedded content suggest an attempt to trick the user into downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/123?utm_term=gmail+drive++for+windows+8
    • https://static.s123-cdn-static.com/uploads/4477173/normal_60068173416a5.pdf
    • https://cdn-cms.f-static.net/uploads/4411503/normal_604ae15ce095f.pdf
    • https://cdn-cms.f-static.net/uploads/4470412/normal_600b301b8a305.pdf
    • https://metekazup.weebly.com/uploads/1/3/2/8/132815755/lafukowisin.pdf
    • https://static.s123-cdn-static.com/uploads/4366055/normal_5ffa67d8db3d6.pdf
    • https://majurunonixo.weebly.com/uploads/1/3/1/0/131070356/1256160.pdf
    • https://rekilobuviren.weebly.com/uploads/1/3/1/3/131380299/97f47aac310d2f2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nusuwoxub.pbworks.com/w/file/fetch/144415356/nolajakajifo.pdf
    • http://pusavivo.pbworks.com/f/xokowarusakorub.pdf
    • https://uploads.strikinglycdn.com/files/9686b7a8-5fc6-4ea1-841e-f55c6709eff2/41806838535.pdf
    • http://tusawijer.pbworks.com/w/file/fetch/144454311/wild_animals_colouring_book.pdf
    • http://lerepaxa.pbworks.com/w/file/fetch/144514020/cuento_mi_maestra_es_un_monstruo_gratis.pdf
    • https://uploads.strikinglycdn.com/files/97f58934-330f-4b7f-a701-534b603dd252/petebasusozod.pdf
    • http://sejiliki.pbworks.com/f/personal_statement_for_college_examples_nursing.pdf
    • http://zezimin.pbworks.com/f/gajutatudi.pdf
    • http://lopofemusun.pbworks.com/f/93492934065.pdf
    • https://uploads.strikinglycdn.com/files/2cb5f948-a915-46e6-bf0d-71cc0c6bdc39/python_enumerate_list_in_reverse.pdf
    • https://uploads.strikinglycdn.com/files/2a869abf-a54d-4bd9-a5f5-474f9a031dcb/pubakojojiravavasubun.pdf
    • https://uploads.strikinglycdn.com/files/a49039a0-72d0-4f11-a280-74b2f16371a0/can_802.11b_connect_to_5ghz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8a.bin
aef5c0ace2954c308c0d73228ae922bd688bdfec8161999cc52d6b92728105c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 5432 bytes
font_01_sfnt_off0000ff00.bin
4197c6f54243b3f34473924168325464989cbf2a0e870cf9550554225a4d9e75
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 12908 bytes