Malicious PDF — malware analysis report

Static analysis result for SHA-256 555efc6ef702296b…

MALICIOUS

PDF

60.6 KB Created: 2020-11-18 03:21:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3c2689c58aa5bff72177c0b4cf10e514 SHA-1: d279c8e4cb8c0bc4a57343de0a015816955bd5c4 SHA-256: 555efc6ef702296b10c77c77d7c440e71fa5784c01e24e61b6a6b68d562977f3
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/123?utm_term=the+biology+of+osmosis+jones+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f873bffaade1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410214/normal_5f9beb178367e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_5fa12a3a848c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f873a4f603dd.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/gizonukorad/pudikobegipopu.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/pimumapakakabuzegelajup.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/showbox_apk_windows_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/clasificacion_de_los_seres_vivos_unam.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/ff14_eureka_anemos_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/zidomukovig.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/1810008040.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/dead_trigger_2_cheat_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/xowonoxowurojonijukon.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/bahaya_penggunaan_narkoba.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/things_that_start_with_an.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_off0000b1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C3 5604 bytes
SHA-256: a64eb0f85d5f2b0ed12020b8c974b16b3836d6291d53ea81682f7e66d1cbcae4
font_01_sfnt_off0000c4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C5 9748 bytes
SHA-256: 11d8d223d39f5246dff2ba249c702d38f93d807672c634cdbfd1412b960fadb6