Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff69599c83c32a6…

MALICIOUS

PDF

70.3 KB Created: 2021-02-21 01:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 04853c586a400e6bd01108e8ea64c39d SHA-1: 30a56c848e5da94e50fd053268c1448dddc0ba53 SHA-256: bff69599c83c32a64e4169105f439b7429158ee263b88b933a6b3abc69d631d4
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect the user to a malicious site, potentially for credential harvesting or further exploitation.

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://maypoin.ru/wb?keyword=tork%20mechanical%20timer%20parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5fedccdceaa23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388813/normal_60031b7340882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_6014fbc7ae925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_602be7dbb5f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5fe61cb03413e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465565/normal_5fd2ceaa946db.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/tizeri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_5fe9cecaba57c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485570/normal_5ff88eb8d26a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kefefetafij/makeup_products_list.pdfIn PDF document text
    • http://magajavopisili.epizy.com/electronics_books_free.pdfIn PDF document text
    • http://magivuxitafexox.rf.gd/37880069049.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/d_aguilar_highway_traffic_report.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/yield_sign_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/1087341927.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/radioguided_parathyroidectomy_cpt_code.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/acrylic_sheet_singapore_woodlands.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/3991305743.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/motu_aur_patlu_photo.pdfIn PDF document text
    • http://monawob.epizy.com/archicad_12_gratis.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_off0000ca16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA16 4972 bytes
SHA-256: 0e63acfe06ea3d04cd8db0442c96c06f1500455c58eeece6c5ac24304ddc6329
font_01_sfnt_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 10232 bytes
SHA-256: 884c746a3c3977ef104a117bbf6bea177c8974bd4ca37315a82e7d7fd5d01191
font_02_sfnt_off0000fdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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