Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce83c2ae67d0d5b3…

MALICIOUS

PDF

80.6 KB Created: 2021-03-25 10:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adb2e5d493f4b9f52548b99a2ae67251 SHA-1: 28dc5529fe27e0344412afa2ac77fb42008f8a9e SHA-256: ce83c2ae67d0d5b321215720b7c0ed6a388f1979b29e2263ffb9233de1600f5d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing page. The document body, though heavily obfuscated, suggests a lure related to a scientific experiment, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://jottigo.ru/aws?utm_term=experimento+modelo+atomico+de+sommerfeld
    • https://cdn.sqhk.co/tamupoto/Ukijsha/kuloke.pdf
    • https://cdn.sqhk.co/nigulavax/UXFjjhj/49603762578.pdf
    • https://tejaxoxujita.weebly.com/uploads/1/3/4/3/134368030/tobovo.pdf
    • http://peuly.xyz/lupunozcj3yy.pdf
    • https://cdn-cms.f-static.net/uploads/4448357/normal_6051590966e11.pdf
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/f34b3f68363e2.pdf
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/d4f9b6b4b4.pdf
    • https://cdn.sqhk.co/fuzekofuwe/AAGfijo/playstation_5_cyber_monday_restock.pdf
    • https://cdn-cms.f-static.net/uploads/4368266/normal_601527dd70330.pdf
    • https://cdn-cms.f-static.net/uploads/4455387/normal_5fd99e216bbc8.pdf
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/mimup.pdf
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/menopaginap_nezigesa.pdf
    • https://cdn.sqhk.co/xexerekija/fjd9Nng/vijay_tv_mahabharatham_mp3_ringtones_free_download.pdf
    • http://eferevole.com/loloznvqyu.pdf
    • https://xezaresirut.weebly.com/uploads/1/3/4/7/134712286/kujujilibenafevib.pdf
    • https://static.s123-cdn-static.com/uploads/4478669/normal_5ff1614db7c05.pdf
    • https://vuvitolivudiru.weebly.com/uploads/1/3/2/7/132712253/tutax.pdf
    • https://cdn.sqhk.co/dofexoxev/hf7icsi/king_archery_bow_and_arrow_set.pdf
    • https://dodagifudawawub.weebly.com/uploads/1/3/4/7/134750091/cd3a0d62b2ec9ee.pdf
    • http://tameeniraq.com/tylex_30mg_bulamiglo.pdf
    • https://cdn-cms.f-static.net/uploads/4488102/normal_602c3a372f232.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e74802b6-5643-4ac2-a9fb-235415dd8bd8/71533463197.pdf
    • https://uploads.strikinglycdn.com/files/0152db63-5a25-4dec-adc7-e04c124a028a/que_es_el_tiempo_cronologico_en_literatura.pdf
    • https://uploads.strikinglycdn.com/files/258669d1-43ef-4a09-baa4-5d5e0cc84774/how_to_reset_ge_gas_oven.pdf
    • https://uploads.strikinglycdn.com/files/964f5663-933b-4a28-aeba-6061d1e9f145/30936287576.pdf
    • https://uploads.strikinglycdn.com/files/aa71669c-214d-4272-9b05-b430bfcadadc/construct_2_free_version_download_full.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc75.bin
6437ad122ed1a1222e8a2c273e14eedb5166df5bb8f468f7a7afe660a6f93aec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC75 5328 bytes
font_01_sfnt_off00010e80.bin
1ca93a74bd1212686f00d587d1c5cdbba4ecc43f25661d436778fca5080c2394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E80 11328 bytes

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