Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b3113896470cbd…

MALICIOUS

PDF

78.3 KB Created: 2021-05-06 03:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d218be182e8f7ac153866f62f25c5d3c SHA-1: 64b969dbd66abca10293bdaf7df4d2448c3124a9 SHA-256: d3b3113896470cbd8e77446c11bf8a51af070dcadee3c588baefb46ab851f87f
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, masquerading as a document about punctuation rules. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

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://jacksth.ru/strik?utm_term=punctuation+rules+with+examples+pdf
    • https://cdn.sqhk.co/watexoba/icijVjb/computer_notepad_notes.pdf
    • http://sevibifodome.getenjoyment.net/genijowoxokonuvesusotabiz.pdf
    • https://cdn.sqhk.co/tuwovado/mrgfoTT/the_scarlet_letter_study_guide_answers.pdf
    • http://voiprormul.xyz/minecraft_1._0._8._1_free_hiapphereya55y.pdf
    • http://lnstagram-help-businesss.com/1en19.pdf
    • https://cdn.sqhk.co/raserijene/hfjfjhI/athiran_trailer_video.pdf
    • http://gallery-shop.site/seventh_day_adventist_church_songs_freewzpih.pdf
    • https://cdn.sqhk.co/nejisakatok/jbKN86n/speed_racing_ultimate_3_apk_uptodown.pdf
    • http://ninujovapazolo.iblogger.org/maplestory_leveling_guide_black_mage.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/064501b7-0306-482e-9f1d-2203785d90b5/what_is_project_based_learning_in_schools.pdf
    • https://uploads.strikinglycdn.com/files/3d4eb947-1aad-4f73-a84b-8a52b0dafce9/20949886755.pdf
    • http://gogujigasad.onlinewebshop.net/morihei_ueshiba_the_art_of_peace.pdf
    • https://uploads.strikinglycdn.com/files/c55d5501-0116-40be-af6c-b070b0e7646b/10448420352.pdf
    • https://uploads.strikinglycdn.com/files/81a0253a-0f96-4768-9494-38b0b5f8a082/59611637468.pdf
    • http://zobatokuvanoz.epizy.com/anchoring_script_for_annual_function_in_marathi.pdf
    • https://uploads.strikinglycdn.com/files/7e999fb2-2393-4979-8606-7bdbfc0961d5/autocad_civil_3d_split_profile_view.pdf
    • https://uploads.strikinglycdn.com/files/814c0387-f45e-4d7f-8f92-ce9487cf0f44/fizugepofuberovuvumad.pdf
    • https://uploads.strikinglycdn.com/files/6fdc287f-36c3-44bd-85a3-54aa7fe22954/vishnu_sahasranamam_meaning_in_kannada.pdf
    • https://uploads.strikinglycdn.com/files/dffa5ade-54dc-4957-ba75-2667800b6742/commercial_cool_3.2_cubic_feet_refrigerator_freezer.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_off0000f415.bin
97be7dcea7d34215febf99e1ae8f5a2a4feeba4b552bba3fb2c0ba9d926fde70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 5556 bytes
font_01_sfnt_off000106e4.bin
53733dae18c7337da313055379e0f0f7a848c60553fee8687ee825cd33ab5f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 10828 bytes

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