Malicious PDF — malware analysis report

Static analysis result for SHA-256 9510ac1d32a166e1…

MALICIOUS

PDF

76.8 KB Created: 2021-01-20 04:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c8e9ff003c7f34d46d87309999c0369c SHA-1: 373ca57eba06d58345c435b11f44664eab30d62a SHA-256: 9510ac1d32a166e1f357485c44ec483590f0791c9dc64e35e9d09ad26209f60b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector suggest the document is designed to lead the user to a harmful destination.

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/wb?keyword=chores%20in%20this%20house%20cat In PDF document text
    • https://site-1174928.mozfiles.com/files/1174928/dexobinas.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/ixhf4je/gacha_life_2_apple_ipad.pdfIn PDF document text
    • https://site-1176708.mozfiles.com/files/1176708/rolutimaporubezowapujulid.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/muwovijiwebulojof.pdfIn PDF document text
    • https://site-1173625.mozfiles.com/files/1173625/monkey_bar_rungs_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/l3hfgJq/recipe_buttercream_frosting_for_cake_decorating.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/fgcqvji/80472081497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8a6c07514e7.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/dovulavavo/94622464305.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/technical_drawing_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/cinco_de_mayo_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/winrar_for_pc_english_version.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/colorado_warranty_deed_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/android_auto_not_on_sync_3.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_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 4760 bytes
SHA-256: 3d3ae29b74323f17a480b3c01c851fcb3bc831e0af29ce9d76c1b238df8ac6b6
font_01_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 10412 bytes
SHA-256: e124a976942ce82bb06e298da9f8913d8c104d17b811c5d4ba59c7da01cb26f3

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