Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad6e3545a32b8cf…

MALICIOUS

PDF

76.0 KB Created: 2021-06-11 11:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b80f9c7c926d70016b0b585eddb21c23 SHA-1: 5231ce9d3106a9be1dd58c8f16e4487290aff9b8 SHA-256: 8ad6e3545a32b8cffac14519c02153ee9ccb7ddc488d0304cbcebd05153f3e79
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of an external URI suggests the document's purpose is to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

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://pistant.ru/pbw?utm_term=gta+online+vip+work+payouts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366005/normal_60149db56ff81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382406/normal_5fec4160e46ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415527/normal_6008e6fd84921.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_604db348ee18b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_606e5abf7c251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fe6df00e4976.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367680/normal_5ffa3c380b197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_601bab2aee658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_60c04a55d343c.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/51981975-01e3-47f6-b677-30ed38bb43e4/what_should_my_25_month_old_be_saying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49488eeb-7769-4016-a10d-18e7ec4d38e1/fopafilerolobefig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2be9f9-3232-4872-87b0-e495330b559a/beluwese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6428e51f-b508-4242-bfc3-8799533477e5/61926991638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cf6e4c7-1c5c-4ba2-a2af-b2c556744865/27888677140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e476bf8-a941-41b7-9109-0e2f80d060cf/garigevab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0b2a07e-b885-49f2-a4e9-01c63f86c295/12208967609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c362391-0410-4de5-9f10-1690947e26f5/how_to_prepare_for_12_board_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6cd7a2f-309a-4fcf-8138-9d7afa8e0f2c/metric_conversion_ladder_method_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05f9077-65ee-4b03-ae3e-e10eeb2615fe/beguzinojefoxorikof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ceb870d-a690-48f2-a90d-6c662b9fbcc2/19185815747.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_off0000ee18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 5160 bytes
SHA-256: d07000c07b893aa2a13372e5ec019137273135ef4e5adeb381da151949ce6a2e
font_01_sfnt_off0000ffd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD9 10252 bytes
SHA-256: 0fa9d25ef44d37d57900be0dfd83bd120a398657a94a9a5816621448802faf9f

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