Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a8ecdb2aec5adb…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 07:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3ad092fb6a8f19bf3890adb38b4b725 SHA-1: 539eacc0d6819f6d2fa54c83e77dec0cba9f1b54 SHA-256: 91a8ecdb2aec5adb65240a0ad554bcd7370bb034834d093543d948ba99a33360
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://bologen.ru/wix?keyword=wow+wotlk+level+guide+alliance PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373776/normal_5feb79d153ced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_60631722ea9e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384463/normal_5ff6338cb9748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406501/normal_5ffc9d2a47089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_6037c2c8e37a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5fd5f575853f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377663/normal_60620bcab3836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_6061f9c67fbc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_6004bb7bce2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470408/normal_60671ff976696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_601cb1447d94e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6037dcd11b57c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_604a015c27ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481825/normal_5fe7023f01f67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470024/normal_60557fe68918b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_6043b980b2b7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuzavaxevarap.epizy.com/84597656707.pdfIn PDF document text
    • http://puxedevonizu.epizy.com/absentia_dx_manual.pdfIn PDF document text
    • http://jubegovasoranaz.rf.gd/51766683293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ac3719-697d-41b2-be2e-93e5fd99320b/9066189858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea39e21-b40d-4e14-94eb-c3d8b6fa0850/xigonatijogak.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_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 5064 bytes
SHA-256: b79046df4457f1a2481679416db6cfff1d5c1d5c8e4e4b73fc849c86e788c0fb
font_01_sfnt_off0000ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 11292 bytes
SHA-256: dfe781065f81d56013b977b257f809e40b52deb47b734cf69d039c1f8f948e40

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