Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cdb4f5bb41ab16…

MALICIOUS

PDF

95.4 KB Created: 2021-06-06 18:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 18ea3322d87fcff1e7b9e79521c696dc SHA-1: e23fbd82fc93a0cff0779e80905c54b6c33b5703 SHA-256: 79cdb4f5bb41ab16bd5a1d0d31836522c6a672fbb52effe98442a115d0d596f8
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 0.9993

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://pistant.ru/pbw?utm_term=apuntes+literatura+1+bachillerato+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455684/normal_602774858d49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_60396c5a292f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_5fcc07c7302a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401976/normal_605be712115ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_605c2ae85037c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456143/normal_606787f83dce3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387218/normal_600fcc6077fc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461229/normal_5ff8636466b05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_602eda731b7a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_6032cc883d0dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_60001584c99ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476566/normal_5fd064bb9121d.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/d1d8d3d4-57cd-4c5e-90d3-c34bacb07ecd/xegutopokiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d58bfc-486d-4212-9e10-21d62bd24d50/tone_hbs-900_bluetooth_headset.pdfIn PDF document text
    • http://pisaxolakek.pbworks.com/f/what_is_new_historicism_critical_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8facf7e-09ec-41b8-ad53-c10e30d2dba3/lugividu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7de68d-cfef-496f-add8-bcfdaf7cdb98/hack_brawl_stars_unlimited_gems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cc1270b-7a28-4eae-bd86-e019c6a8bfed/42604143941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9c20f8-feb2-4090-9700-f55b47efdd37/what_are_the_five_characteristics_of_an_epic_poem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b6c7db0-77c7-4dda-b592-88d956feb481/modo_basico_de_comunicacion_humana.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/f/tanker_charter_party_agreement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774eb120-251f-4506-9fa7-cd3e9106121c/nufeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867ceb79-5a4d-48f5-8918-a9d55851edd7/zavaje.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_off000134a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A4 5424 bytes
SHA-256: 7763f60a0bdf18ec1737028586466c15bca30ed1d59c188d6544da76a1872a7f
font_01_sfnt_off0001470a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1470A 12664 bytes
SHA-256: 8ee134ebb50df97c671b9ab0f2682055d7feff56de25a4579c92e3c137fb1d97

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