Malicious PDF — malware analysis report

Static analysis result for SHA-256 d79e28361745d1bc…

MALICIOUS

PDF

74.8 KB Created: 2020-12-03 05:56:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9a58649501e809fb12a87c256fcbd883 SHA-1: 75c255f7068babb526d4f4f27841148f7ead0356 SHA-256: d79e28361745d1bcb7be7835973b0ff1ac5591031e6982721f230518ade6b7fb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, flagged by heuristics and ClamAV as malicious. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/123?utm_term=vertical+line+test+graph PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5fb8fa84b4525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f8d391f57215.pdfIn PDF document text
    • https://gekubunog.weebly.com/uploads/1/3/4/2/134235395/bb8f6ce8822853.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/51620661-c0e8-43fa-900d-b62f5902f2ce/jibur.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/xoluzudolobataj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffea5239b0722912c2f3a/t/5fc0dcf97acac6192ae139c1/1606475001618/jawuxesikil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013a70a2757459bde56bb/t/5fc2deba3570fb44d1623571/1606606525808/17923224391.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfec92c6de34c7a392863/1606221514044/glass_etching_kit_michaels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b351712-a5b6-4673-a1ff-43ed558258f1/mividodamonodawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21cf001-4b75-4895-8829-97effb47e170/hulu_live_tv_app_for_samsung_tv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AB 4836 bytes
SHA-256: a494ae27fb0ed50774ad096e957ce48ac2ea0af4b8abe01c09aa5b68596e22d8
font_01_sfnt_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 11672 bytes
SHA-256: ab094bc42c18b7920e9a3a8af4cfc77f7b36b303dd6823c73832d66ef78dedad
font_02_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 16132 bytes
SHA-256: 43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6
font_03_sfnt_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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