Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b500d1cfbadb699…

MALICIOUS

PDF

72.1 KB Created: 2021-05-22 00:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6a98a50d28b3de97235ccd76999e261c SHA-1: 115f32df6b134a1f4cce2eb978596fd821999722 SHA-256: 8b500d1cfbadb6997bd81289c2e6391206a06606f88a12a4ecae2ad3b33e3034
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 0.9998

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://dafemum.ru/strik?utm_term=what+are+nouns+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451229/normal_606ea3b9805cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392854/normal_600317f383476.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404976/normal_5fca4baa4bb95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_6018607eb68e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_601d125ea8f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411250/normal_60351f083f229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_5fd7c01b57f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495402/normal_602755a7278a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5fdd3d14e2809.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/8d409cb3-802d-40a8-b4f3-2d73ee735970/what_color_to_wear_for_second_wedding.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/82919583146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f296216-6455-4603-9f51-ba57a6fe139d/how_to_change_the_name_on_esi_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72495cb-c534-40bb-9593-0764f3288747/jumazisav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961c06d7-b9d4-4424-9c6c-cfaf3a692fb8/are_any_thrift_stores_open.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/volver_al_amor.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/sistem_informasi_akademik_unsoed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7cdfb4-4248-49b4-b06a-bee7e68dd549/how_to_hard_reset_a_moto_phone.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB6 4912 bytes
SHA-256: 7012ab3d646f23abac3f7f4a13280e124da221cd79e1e425a272d0e5b4575cbf
font_01_sfnt_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 11260 bytes
SHA-256: 7812c2b43c777ba1a2eb45c56aaea9e4b8dfab6bfe426dae37609d3bfb1ec4c5

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