Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ee495e1dcb53e6…

MALICIOUS

PDF

122.4 KB Created: 2020-12-01 23:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d28b1473ba3fe1adfa053458f59d75bc SHA-1: db2a4d3d5731b6d8ca281f0eba20476fb7340524 SHA-256: c2ee495e1dcb53e6acf63f3173ae4524a46d53b8b447cdc4996d7b49cfe22a10
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/strik?utm_term=the+picture+of+dorian+gray+pdf+vk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443815/normal_5fb7591c1a34b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8751dbd5ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415052/normal_5fad75ce4b434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490380/normal_5fbc1b99b9294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f876455aa3aa.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/lokijuronig/nososugoxezeliridimewa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/96408094458.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/vorifejoxoviwufebopu.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/usher_yeah_lyrics_translate.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe24ed3c6ccf69f327db40/1606296813802/chelsea__theodore_leggings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87642034-caca-4035-9635-30947adcc4c9/how_to_block_someone_on_deviantart.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112c117e7202640eb3140/t/5fc2bfc908845d0924e4584e/1606598601351/32202889682.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10304b8467722f1d4df02/t/5fc45950f3de5e49b5ef6add/1606703442628/rules_of_family_feud.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/subway_app_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/archimedes_information_in_english_flotation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D87 5380 bytes
SHA-256: 25b23f821087b519cdec89c97ed4d01e9515f5c88984052fa968e17baf8732d1
font_01_sfnt_off00018fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FDB 17236 bytes
SHA-256: 4d40e2aa69f30889f50610294c6910d894a3317384f5e26bc6ee213b97cac9ee
font_02_sfnt_off0001c50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C50D 16592 bytes
SHA-256: 66d59c152b7fb934c62fc9fa1fca3b11bae168ab302612f17974c150f5389706

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