Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e408966dac8945…

MALICIOUS

PDF

74.0 KB Created: 2021-01-08 21:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 51eaf705d3fde4dbc41225b72fd64407 SHA-1: 5a26874d92d8ed14483ac60aff69737d6e7a3411 SHA-256: 38e408966dac89458f18c312db6daf714b4d29a9533decf86a57468ee38c002d
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 a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although the document body is heavily obfuscated, the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/123?utm_term=ty+christian+harmon+images In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degagaziv/wamujalezatewuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/extent_report_with_testng_listener.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/mail_access_checker.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/molecular_plant_virology.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/pmesii-pt_example_iraq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff98285-2977-4f01-a734-03b36eda0f5f/fear_and_loathing_in_las_vegas_free_online_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/asbestos_survey_report_massachusetts.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/melivife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722d3541-8fe3-4158-8b07-55ddf351b83f/17584488382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8841331c-33e6-47ae-988c-1443cd60139e/showbox_apk_for_amazon_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06b1eb89-8c0a-489e-a23c-2c05fcac8f0c/best_hot_wheels_track.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/bulumipa.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/mudexegid.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/fetalekogafaribezoxigulut.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_off0000e51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51C 5232 bytes
SHA-256: 455dd4ccf3c0e903a02926d1f6e4ce3a0e998001ae8d001dc39d3af36bb1aff3
font_01_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 10700 bytes
SHA-256: 2324370ab3f88ebc39652a1c4b6358486238582b589d1434d1f87e16d29e87cb

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