Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d868f603e70b3f7…

MALICIOUS

PDF

65.2 KB Created: 2021-02-12 11:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2fade14cb64422ce2609fb6ed3d7b004 SHA-1: 5682b9feacef17fbf44f8ba0ba3910a67a3c0352 SHA-256: 9d868f603e70b3f795ab8b7d8282dc9e5617dd958b9bd5f3585d7c3a855805cb
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://crophysi.ru/123?utm_term=isa+p%2526id+instrumentation+symbols'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body strongly suggests a phishing or malware delivery attempt, aligning with the 'Spearphishing Attachment' technique.

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://crophysi.ru/123?utm_term=isa+p%2526id+instrumentation+symbols In PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/jd13K4J/61178534658.pdfIn PDF document text
    • http://damodudajipofem.22web.org/yorkshire_post_business_reporter.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/oC7ghf9/mine_survival_mod_apk_unlimited_life.pdfIn PDF document text
    • http://ukranews.site/american_football_players_namesxetq8.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/android_1_modded_racing_gamesgz9nh.pdfIn PDF document text
    • http://zomebosanetoviz.22web.org/kuzojinalus.pdfIn PDF document text
    • http://metalllift.ru/black_panther_2_rihannanwvb5.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/iiMRkzG/15069778483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/wutamudomagijulaka.pdfIn PDF document text
    • http://lubelulezafi.rf.gd/aaranya_kaandam_2010_tamil_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/adm_pro_cracked_apk_free.pdfIn PDF document text
    • http://vegunag.rf.gd/wemit.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/masobigufoloj.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/3394789355.pdfIn PDF document text
    • http://runoxujozu.rf.gd/bullet_force_apk_obb_file.pdfIn PDF document text
    • http://lafuworukegi.epizy.com/79219804642.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_off0000c31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31B 4620 bytes
SHA-256: dbec234d07356b78896349fe6439e8f80495b257f760a612162b545203ce1eb2
font_01_sfnt_off0000d2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E7 10448 bytes
SHA-256: d5b01d2e40ee53adb1645168807f1d2ab7a7cb58830d2d94fb638b9f861046f6

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