Malicious PDF — malware analysis report

Static analysis result for SHA-256 e557e85393c17d81…

MALICIOUS

PDF

66.0 KB Created: 2020-11-29 17:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 246e9cd131d512b8dfe161315216fd31 SHA-1: 21233207cb0267b4bbd1a678741d1ff4f1b7e6af SHA-256: e557e85393c17d815155da2e54b9637279ee49c34bf424afa336b39ee4baa377
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 0.9998

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://traffine.ru/strik?utm_term=median+income+florida+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455195/normal_5fa531e29ba94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f8c4066ed630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f8b3fd5c5bd0.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/likadojivivofu/braeburn_2020nc_thermostat_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/58840131278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191898df-d004-4bdc-9d61-725adde1e197/dns_server_for_clash_of_clans.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/que_es_un_analisis_dimensional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c945647e-9e80-4385-bb39-2aab569eebb7/21714152285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b257f62-1fa5-456a-a005-b14a6e354730/irs_2020_tax_form_1040ez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84702f7b-74d7-4cf9-b796-fe022fd76687/vr3_5_channel_amp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37da0404-8cc4-44ba-bbef-297654579ea5/lijotutu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/oxidative_stress_effects_on_exercise_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/899703b4-9316-464f-9918-9a6d8d78979f/the_bourne_supremacy_online_sa_prevodom.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/23156780274.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_off0000c38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC38E 5476 bytes
SHA-256: 547bdeca0f73ca87e47cf991fe2c94db36a58d326c322eafa2592ad4400477c7
font_01_sfnt_off0000d62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62A 11124 bytes
SHA-256: 79b054b5576a783d2f9f62a95bbde60c84e568c1208801f45ef0b0fbda0b5cf8