Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c423d5a56ad98df…

MALICIOUS

PDF

76.0 KB Created: 2021-04-10 11:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 51db59e0d0e55450f981532caace1eec SHA-1: ea9ea9eff51d3e1ae85dbff11cd7e2b9bf68a788 SHA-256: 3c423d5a56ad98dfb4ed0228ad9ca4595d4101cab7a51ab46d50580c24df9c0a
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 0.9991

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://jacksth.ru/strik?utm_term=organizational+behavior+topics+for+essay PDF link annotation
    • https://cdn.sqhk.co/nemazuwigumo/ZYFiahd/zawus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_6063eb847bda4.pdfIn PDF document text
    • https://cdn.sqhk.co/gapobuzijiru/cL4GChj/jotiberomoruro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392210/normal_5fd04b6f2bb41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5fddb9cac56ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451551/normal_60228b8a62ebf.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/gjji2gN/27271958897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450424/normal_602de723b93fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5fd611ef113ca.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/Vhegjzj/wilibofoxajezisorewod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366040/normal_5ff82a34d1d3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_6016e1fd84a37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394060/normal_5ff04823d955a.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/vojapu/what_are_some_tricky_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/50738283606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a67186-7afc-4d07-8b99-e2ab9868b757/how_to_use_palo_santo_wood_sticks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f049dfe5-267b-48c4-b42d-881d67789340/49241045326.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/nibenevomazexa.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/taxivekefewir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b1a1911-ad1d-4962-8352-0571e6402ad9/how_many_hours_a_week_do_you_need_to_work_at_starbucks_to_get_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7517f99f-45f5-42e1-938d-236a31ffe543/19246535465.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/10530303566.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/32186712060.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/levejokuvelapupegufaxel.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_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 5656 bytes
SHA-256: 24e14541fe012a3d29242e3d018fbcc4c2f7932609804984c2d5000f68406ad3
font_01_sfnt_off0000febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBF 10504 bytes
SHA-256: 7387a11222e6404df1a0d560369734184e5d9ff31fe2015ac0841d0a5657e1dc

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