Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5dd0bd230ae3d1…

MALICIOUS

PDF

88.3 KB Created: 2021-02-27 08:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b1760cfb5fd9c0e06fce8034945dd33c SHA-1: 4bbc6b6f2312a46f3fa82e21275a898cef8149a5 SHA-256: 7e5dd0bd230ae3d12f021aa74645bb7e14fd39adf81def28f861cabf10c6978b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains a string that appears to be a search query, and an embedded URI points to a suspicious domain. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

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://maypoin.ru/aws?utm_term=will+you+end+my+pain+roblox+id PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404976/normal_60062ba2b3747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_5fd3a5583fd65.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/zoniforeritevatakokavid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fe617dd9ce6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416514/normal_5ff85d7ce0892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_600a221642507.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466153/normal_5fdea35aa7f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_601e0b8b4a588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_6039becc21b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_601fe07a0ad53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_602f1348ad371.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/lezerawe/67270536819.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/carcinoma_cervical.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/nadalamotegikodinanatupej.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/free_letter_writing_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/rimuwimububuvarejosunuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/guided_audio-_visual_entrainment.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/attalla_city_schools_information_now.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_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 4556 bytes
SHA-256: 4e1d961a36782b1e549b58a8a9b2df42f8636cf89fb85e2708d58c1b3f5e1195
font_01_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 5248 bytes
SHA-256: 0617ec70b9fa6406b1e034620763566308922a141d5c590586221a1b95bb8d19
font_02_sfnt_off00012d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D3F 11268 bytes
SHA-256: edd683c36c051f351a17509e7eb0329ea670edeece887bc101d1628a6baf415f

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