Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88b1b05459f6258…

MALICIOUS

PDF

68.5 KB Created: 2020-12-16 10:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7712aeb0a00e719a3a495a7cfe7ff8ee SHA-1: 6d592f6a4a53fa88d4573ecf19116ff80ff1bfe0 SHA-256: e88b1b05459f6258659f7d14c31b3f070a911361f6f96edc1f31b78dbf62943d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?utm_term=lluvia+acida+causas'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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=lluvia+acida+causas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f94f3791cced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fb408f3c4424.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/45600e2b-f95a-4606-b94f-889e0833743d/high_performance_habits_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/103c338d-1127-4275-b588-5ff3c8fac7d7/34973221562.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7942e9ea50d4120a26292/t/5fcece5aba7003536e98786d/1607388762771/get_followers_apk_download_uptodown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f2e00ee-cd9a-46ab-baf3-0f1eec9fe04c/79633862591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a368448e-5d9a-48cc-b46f-2f6ad6aa5070/89098560630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f46a30e-b763-4146-9954-151bd44aceef/28557467755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61777f97-58e7-492a-b644-9f23531f7244/hitchhiker_s_guide_to_the_galaxy_computer_42.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac823688-1e6e-4c00-b5a9-429cc8f8b621/telecharger_livre_de_cuisine_algerien_gratuit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc646218ef7301f8b3592d3/t/5fcaab619c4e6e5b1e0c0d8b/1607117666094/messenger_vanish_mode_screenshot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c9392bbd74065812d409/t/5fc7cb1fd9e12858b402936f/1606929188913/86336480004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe80714-f59f-4332-aa25-74ba0f6ae053/voranotoloxekufufupafopun.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_off0000cf35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF35 4840 bytes
SHA-256: 4c5cb84ed8d5f9938c16ae0b51d476b87452e745ad6e0e56f0186e4efbfa7f9e
font_01_sfnt_off0000dfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC2 11084 bytes
SHA-256: 6acbf8614d978327988df4be56f0504d0b6b3d95950e656135799f75e8cef391