Malicious PDF — malware analysis report

Static analysis result for SHA-256 354ea05668c3c0a1…

MALICIOUS

PDF

68.1 KB Created: 2020-12-24 07:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 58e033a3e2e5d8df90b7fe210f8378e0 SHA-1: 50ec07347b001e86137c0a1431cbb3629fcc17ca SHA-256: 354ea05668c3c0a1e1358cde31146a92b7a2c1f9683255c7b880d38d7f0d0b26
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/aws?utm_term=how+to+answer+behavioral+questions+star In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479932/normal_5fbd65ed00d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f8dabd9e37da.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/vafopixumiso.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/runedefatimi_roboxajomumobe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fdccb8e9d515.pdfIn PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/kilesoj_vonawetek_razotofazo_kivinaxufesoliv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc37aeae-b004-4739-817f-5fd22c37211c/ge_gtwn2800dww_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/chori_chori_movie_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/grammar_practice_worksheets_first_conditional_negative_sentences.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/41218864726.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/find_definition_cautionary_verses.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/38617461272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac122dd7-ffd6-4648-917f-c518fb1bf41c/22956972868.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/jorewabes.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/27913926770.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_off0000cf91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF91 5152 bytes
SHA-256: 9bace1ed082d296c89a352b747e66c0c3a921214b72027954ce6851b00a2390c
font_01_sfnt_off0000e128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE128 10044 bytes
SHA-256: f8ca5345e02ac8f7bfc284c45dc3f1a19d001c1d528b7613aad81eb75bff4dd3

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