Malicious PDF — malware analysis report

Static analysis result for SHA-256 8359af48f1aaf901…

MALICIOUS

PDF

82.5 KB Created: 2021-03-18 22:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19fc1de68ef870917a423d0f153608e7 SHA-1: 2e2b0fa263e4ec119bddb8d534cdb330c7bd8a03 SHA-256: 8359af48f1aaf90180331a9a530a0c04c605d1519f09d44a6e92d36e746d0d67
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a game guide, consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=wow+archaeology+guide+vial+of+sands
    • http://arendaavto.taxi/howard_miller_desk__shelf_clocksdpp6b.pdf
    • http://kejoxemubogese.mywebcommunity.org/wulorofinuvezununibi.pdf
    • http://supariwepexafat.mywebcommunity.org/vozuduketejijupofupuxebo.pdf
    • http://beririka.scienceontheweb.net/99684467391.pdf
    • http://vubitim.sportsontheweb.net/pezerewojelowexutesukap.pdf
    • http://o-karte-kopilka.com/maytag_2000_series_washer_error_codes_sdyexlk.pdf
    • http://xidasetetobuge.scienceontheweb.net/rsum_d_atomistique.pdf
    • http://opt15.ru/oracion_a_san_judas_tadeo_para_momentos_dificilespv6vz.pdf
    • http://rexuwoxaga.sportsontheweb.net/kuboragu.pdf
    • http://dusanaputojinon.mygamesonline.org/steelers_schedule_2020.pdf
    • http://netekepipavosis.sportsontheweb.net/when_the_wait_is_too_long.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cafbec2b-8640-4369-81ce-3c25a3968c7a/jujezafubok.pdf
    • https://uploads.strikinglycdn.com/files/6c8e3cd4-fb69-4616-b1c2-2fcb4f6fb930/gekanevuzone.pdf
    • https://uploads.strikinglycdn.com/files/a8716040-3c85-4c9f-986f-8c20530acb55/92734240908.pdf
    • http://zudupaxub.myartsonline.com/lizutupuvekobut.pdf
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_201135ffe9e94af9bc930fd229a5e0e0.pdf?index=true
    • https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_e0830eb32a1a4c0d963ac0ec40097974.pdf?index=true
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_e0171d69b3a44c35922ff2e9daf62dea.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7d61c4ae-c273-4ca1-abaf-c4fb2720e0a8/delonghi_leaking_water_underneath.pdf
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_ce85e72b68244c11b2a5b95387dd687a.pdf?index=true
    • http://kedisijusa.onlinewebshop.net/tuzez.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_off0001011e.bin
92d9945f2b4fc8cf67269e2192b7848edcb9c544fa13985b9473c0f02b27afb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 5552 bytes
font_01_sfnt_off0001141b.bin
d62b7ff3d5eaaac9f538dc9fcd2d0b34770d95ad79d37729928cce21cfbc98af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1141B 11956 bytes

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