Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a9e2c0a3de6890…

MALICIOUS

PDF

74.4 KB Created: 2021-02-25 05:24:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d81398d049d34c62ac6b783a20467032 SHA-1: bd621e395ea39eb46e01465fa5cbb6288e239877 SHA-256: b1a9e2c0a3de689088b0335cfe608ee4d400920df953a55410684b0b26988b28
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a search result, directing users to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded 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://crophysi.ru/123?utm_term=what+is+our+lady+of+the+lake+university+known+for In PDF document text
    • http://uniques.space/print_configuration_page_hp_p2015mf3ot.pdfIn PDF document text
    • http://semengergel.ru/google_chrome_windows_10_free1oskj.pdfIn PDF document text
    • http://skidki-day.shop/612976698792ol18.pdfIn PDF document text
    • http://jinosewifuwefe.22web.org/titas.pdfIn PDF document text
    • http://tojubilabesi.22web.org/dendrochronology_lab_answers.pdfIn PDF document text
    • http://blacklaser.ru/fojugf3xvo.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/daniwodug/36387849087.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/puzuferowovu.pdfIn PDF document text
    • http://lakiver.epizy.com/training_certificate_templates_word.pdfIn PDF document text
    • http://retuguru.epizy.com/58593856746.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/video_cutter_for_android_2._3._6.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/58000652699.pdfIn PDF document text
    • http://mujunuge.rf.gd/pisogusovu.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/best_website_templates_for_authors.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/epileptiform_discharges_symptoms.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/small_baby_laughing_ringtone_free.pdfIn PDF document text
    • http://lunupesefobe.rf.gd/96807763926.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/55922663848.pdfIn PDF document text
    • http://tixelupaninaber.rf.gd/infinity_symbol_photoshop_template.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_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 5324 bytes
SHA-256: 1c97a2580acc3774870500e86109f64e7b5632757f660c13afea14d71de6ffb6
font_01_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 11060 bytes
SHA-256: c6783b8aab8a20f2ef9c11a1d9bcdafc760f9e8c99b4b85ca9533063138b9063

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