Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e401d2761711b77…

MALICIOUS

PDF

75.7 KB Created: 2020-12-10 09:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fab18d8dc5b47ff480c4ee4ea4e9eea4 SHA-1: 9dafb21d650047a28bf6f90a27eed93b0bb6045c SHA-256: 3e401d2761711b77e2d9623a7184d803df6f166c6d3ba66b58141d9f038759bf
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=vector+calculus+notes+for+iit+jam PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f884de6cd48c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fa92ce86270f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495058/normal_5fb599bbdb274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5fa74cb26f346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_5fb976fb30c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5fa33e237f4f9.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/ludozewowonufalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5fb8213fe91d5.pdfIn PDF document text
    • https://zativazu.weebly.com/uploads/1/3/4/5/134586929/2e8902e8fa73e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc1b8bec30a162e0c583fa8/t/5fd0225ba040431536b38e9f/1607475811009/11813363075.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/pabenapisonodiza.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/lekiwededewode.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0672f60f2895dc1e54ab2/t/5fc83a5dd32d012678f23ddb/1606957662546/headshot_zd_survivors_vs_zombie_doomsday_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/calisthenic_movement.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/finance_budget_2018_india.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DD 4948 bytes
SHA-256: 5e7a1dce24ed6315ce0ed4e24aaf90fbdf30e5f518fb7368f2c0b88b8eba46f2
font_01_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 2080 bytes
SHA-256: 7f5b718fd96f57a2153e301ddc7dd89e5fcdea4933e749ab3aeacdebfd26f085
font_02_sfnt_off0000ee27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 10828 bytes
SHA-256: 72481c50c6c6de834e4af67dfc3f1f91df3a2a3e344444b7d121d49a48340a8f
font_03_sfnt_off000112f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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