Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac581b2f92c0797…

MALICIOUS

PDF

68.2 KB Created: 2020-12-16 21:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 26c3dc0495e8949457bdcb56ca411e57 SHA-1: 1f23d641f5ae27fdfd109a2218331c26eb85af21 SHA-256: 6ac581b2f92c0797c436dd9ee638084499e7b60edc279fa8de0fa1a36903043b
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://trafficel.ru/strik?utm_term=halloween+scavenger+hunt+riddles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5fadabcd8bc11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_5fd0ec9d8967b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449181/normal_5fbc84ab07c5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5f9a41d07bedd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5fa9b41664253.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381081/normal_5f8d7b5c4e188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450038/normal_5fa8e46ea997c.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/veraxawewib/windows_photo_viewer_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/tivarez.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/hymne_a_l_amour_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/scratch_lesson_plans_for_high_school.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_off0000cf0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0A 5316 bytes
SHA-256: b2b18c29642053ffd9203763e26ee26dff9b64ffe65570952e812a5b07818842
font_01_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 10400 bytes
SHA-256: ae0b1975879232e396ff1983adc6fd8969c6c859d6306dc00d05c26842e46ab1

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