Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cb875f302bbf03…

MALICIOUS

PDF

72.8 KB Created: 2020-12-10 14:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3fe35c357f8fe92c7930a3c27dc19f13 SHA-1: 15723b71d30a2685585a88dd463fe1f9ff3084ee SHA-256: 13cb875f302bbf038071fc568aa8518e6dc2aa9a18b04875fdddb096730ee060
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 0.9997

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=presidential+paintball+unblocked+games In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5fa01e04584a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5fafbe0675422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f8c895018bc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416136/normal_5fa6f8421d0b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/750f9336-ec00-4784-8e6a-26c85cfbaffd/plants_vs_zombies_garden_warfare_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/74368583118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de963ad3-c276-4178-9e12-0cfe21f02147/wabigave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c7761f-46dc-4912-b5c1-436f306856af/xagenapawudapegukefonixa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc655159955c744b5606702/t/5fcb39d685bc3a28a60754ca/1607154135529/junivuxinaxow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dddc53-bf7e-4633-a999-1cf2ec11e352/descargar_monster_inc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf08a98f154499f345dbf/t/5fceadadb49024127349a6ca/1607380398292/tags_for_minecraft_videos.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_off0000c7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E3 5596 bytes
SHA-256: fc228dca656bc05383a85e553a256dce909daf1bd93ccb0505d0d7c29174f9bc
font_01_sfnt_off0000dad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD1 10664 bytes
SHA-256: 111b014c1c2a7e8b6278f824d75ead4c435951a6871db06e1fc49dcafaf3c05e
font_02_sfnt_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 16192 bytes
SHA-256: 296b33a6e69ac3fa8ed420f1d1b401a0712a5a108b7c5c6efc73671719323d57

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