Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea77016848838e31…

MALICIOUS

PDF

68.2 KB Created: 2021-02-17 13:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: f20a3487b5ae75dd708f49e53103636c SHA-1: 7c745cf8b720190c3c2aeed098ea9383ffd1cd59 SHA-256: ea77016848838e316feb8007d45e4f89b29c0e3898b1ebbb1dfecf04f80b1469
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/wix?keyword=vicious+pdf+vk'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs suggests 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://crophysi.ru/wix?keyword=vicious+pdf+vk In PDF document text
    • http://zedukibawubige.22web.org/bodyguard_telugu_audio_songs.pdfIn PDF document text
    • http://beststudent.space/the_rumor_come_out_does_is_gaysalig.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/gcCgf4w/guvorojogurizaza.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/gsQggh3/mountain_bike_accessories.pdfIn PDF document text
    • http://topsale.pro/942033910569330.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/8ZGghjj/ladybug_wallpaper_for_iphone.pdfIn PDF document text
    • http://leopards.space/tybcom_auditing_notes_in_marathi1raxz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pumuroxojab.rf.gd/android_developer_jobs_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/41685031431.pdfIn PDF document text
    • http://povuputuk.epizy.com/fuxosugozidodubel.pdfIn PDF document text
    • http://kujinid.rf.gd/earnest_money_agreement_form_template.pdfIn PDF document text
    • http://zamudijofo.epizy.com/ajax_jquery_post_form_data.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/62844387731.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/bar_chart_android_example_code.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/8129991030.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_off0000d017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD017 4900 bytes
SHA-256: 07be9f3ed9f02880900e7e72f0884b079206fe9cafd6936bb4d62b2fad7567b0
font_01_sfnt_off0000e0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 10268 bytes
SHA-256: 61c7b72bb211b65fdbb97b4d6efc2aa874590194e4421f45ec24f64037433111

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