Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c0ed28ba3bbfd0…

MALICIOUS

PDF

77.7 KB Created: 2020-11-19 00:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 920cb86b82db2caa3f4b4b34f74ab358 SHA-1: d47d90332c6b00c8c78d2356acf13c303b5bf07c SHA-256: 35c0ed28ba3bbfd0d1beb13867a64248784e70cd9078fc8f7b11910c5a9f1995
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://gettraff.ru/strik?utm_term=the+binding+of+isaac+antibirth+apk'. This URL is likely used to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=the+binding+of+isaac+antibirth+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f9491d3953e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f9ed80a7ca35.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://s3.amazonaws.com/dejazuvorira/naman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d26733-eb5b-43c8-a86e-490a66cba4cf/zetobimozonojupid.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/68583641881.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c17dd4-688a-4553-8829-ca792b550a1c/roku_remote_app_download_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/villager_sa_monate_mpolaye_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5149e50-d182-479b-a020-9f2f0e280277/19393276114.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/printable_amortization_schedule_excel_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c25038d-3e23-4bf4-a1f2-0f85159dc841/i_know_who_holds_tomorrow_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/gesebawumelugovavez.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/biology_templates_illustrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a123a8b2-5721-480a-ba75-af16d7e80449/6070033777.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/english_language_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/united_design_associates_cheboygan.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_off0000d0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B1 5324 bytes
SHA-256: b4089960d90043d34ae072d5f0cf440ad00f3439b2cd371591e682364235a322
font_01_sfnt_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 10176 bytes
SHA-256: 89aac4625533aa1831704ceb0a3182fea4548289b7242eed0f0fcb180dc4c727
font_02_sfnt_off000105d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06
font_03_sfnt_off00011acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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