Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49551939d696926…

MALICIOUS

PDF

69.0 KB Created: 2020-11-19 08:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 591522808c051dfac7f8b0c46f531474 SHA-1: d707465a539caec53f27ad3de145880d1bc45f8a SHA-256: b49551939d6969265c76e5a8abe94adc653725b1a96fa705a8057314fd35c2a0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an MFA/2FA-themed lure. 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://trafficel.ru/123?utm_term=bluedio+ufo+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5faed3bfa2db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_5fa72b1707e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f8c91e331ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5fabbfaf1b15f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f870881df57b.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/38538da6-8451-4a3a-b367-e21be047e695/percy_jackson_reyna_fanfiction_lemon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce4ff4c-0ea8-4160-b03c-a54b7df24043/estruturas_metlicas_na_construo_civil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65ed383-b823-48ee-b561-86de2277ff41/suzuvuvopelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22735e16-59d1-4a70-89a0-7bf92e1851cc/25589474557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10ceda9-8306-4076-88d9-1a1570103af9/twilight_eclipse_ebook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a7a4b5-1d59-4472-abe9-a97d1c6253df/matewuwoxebakizulewopopiz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD243 5100 bytes
SHA-256: 957945fb9d85d45837f50d6c7d8a0ddde40682561afcd61e73a0ed8ab83a85c2
font_01_sfnt_off0000e384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE384 10708 bytes
SHA-256: 4fd2c77c7722118a33accd9687e720b50660e3cd9584d7e986dd073142965ea7

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