Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fa2eeb71308114…

MALICIOUS

PDF

67.3 KB Created: 2021-01-06 07:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 00af3c6a2851afd88df9a6c3c09d7fbc SHA-1: ef7fb9de0b2750821f01bafedce85abd1a821cd4 SHA-256: f6fa2eeb71308114ff1278cde012db6044c61bde5d5d065341c3d727f001e62a
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. The document body, though heavily obfuscated, suggests a lure related to a French worksheet. The primary IOC is the external URI pointing to a suspicious domain, likely used for phishing or malware distribution.

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://traffnew.ru/aws?utm_term=irregular+ir+verbs+french+worksheet PDF link annotation
    • https://tixosame.weebly.com/uploads/1/3/4/5/134523113/8667380.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5fc9ec04286d0.pdfIn PDF document text
    • https://vominitaxa.weebly.com/uploads/1/3/4/6/134677623/4ca6590cb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476943/normal_5ff0be4e7e52b.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/fupanabivote/bully_lite_mod_apk_data_200mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59fff80-5927-4a87-bda6-4b0cd54db2c8/apk_mod_hungry_shark_evolution_4.2.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4907e87-1af0-43e6-98bc-caace01fa2b9/60777457424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ce657c-d7fc-4ff7-b991-a29055229edb/prezi_entrar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/varunasijuxezejujefamilo.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/car_games_application_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kizuporowefib/takonenupisirokolonol.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/lokamutejararetewufipazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf00a8c-cf52-471e-8ab5-bd3a12e7197b/70466532732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df28c260-b86d-4f98-aef1-45cb6a089060/pacxon_deluxe_google_sites.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1abc4c7c-6af7-49f0-8b82-8549ae6dedc8/gononow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6446364e-25a4-41aa-a01f-155113a565ba/jennifer_alix-garcia_oregon_state_university.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/concrete_grade_ratio_table.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_off0000c72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72B 5436 bytes
SHA-256: a16d6567ec98eab28b823aa71796fd47fa7211628abc374a86783e92d882d76a
font_01_sfnt_off0000d9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C3 11612 bytes
SHA-256: a47dfb88cc665ff7bc047adb7d8eb5a63b758fdbd82d5d715540eead55f53ae5

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