Malicious PDF — malware analysis report

Static analysis result for SHA-256 82346f2324e86523…

MALICIOUS

PDF

83.1 KB Created: 2021-02-04 00:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2ff06572285a00b270767a4c8453d3d0 SHA-1: 50d2ceca63f9d91b20161a299be2d3ad314594c2 SHA-256: 82346f2324e865238e1aeeb159fadd4c460957aa59bec6040bc526ca209ac5f4
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, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'melting point vs boiling point organic chemistry' to entice users to click the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=melting+point+vs+boiling+point+organic+chemistry PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479435/normal_60038e9643cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403274/normal_601088b800d9f.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/H36hfhe/why_did_my_sprint_bill_go_up_2019.pdfIn PDF document text
    • http://onsideball.info/xejatepidefexujidirim6w8i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_5fd9cdc5c06be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_600fab79b7dfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fde349d7b7f8.pdfIn PDF document text
    • http://telemprom.xyz/six_sigma_green_belt_practice_exam0jvex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1e30bcf25.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/paxivogedewilu/pubg_lite_pc_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/carbide_create_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/41922804140.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/29957823220.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/badri_video_songs_free_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/document_a_newspaper_guiding_questions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/96241375686.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_off000107e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E4 5656 bytes
SHA-256: ab40c9a2ea96bcd27e47d1fa26a4714acaff8b1c0ee03cfbe4798c1a631b8e74
font_01_sfnt_off00011b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0E 10444 bytes
SHA-256: 6bb18a12857cf67e2fb974661155726c7d88840e58eb5a0739fc786b202f9e84

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