Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9beec931143731…

MALICIOUS

PDF

98.1 KB Created: 2021-05-21 17:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cbc982e8fd14028985b5ea856dd22a28 SHA-1: 42f07781c216612769c56fc59f0bbd7f89b387a8 SHA-256: cd9beec931143731ac542b9c460814508d37cdc1306477e40113b4c568c4aabb
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 0.9997

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
  • 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://xajibur.ru/strik?utm_term=sap+sd+module+pdf+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383131/normal_605ae9b11e790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455185/normal_604f24b4efa96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_602fe5838bb6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_601d9ee25e3be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460042/normal_601b3a43837da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_605eeb079f3c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528915/normal_6013454a51b63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_60516f1209b38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_6005075e07b2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464313/normal_5ff3b90c54125.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/bef96647-626c-4c4c-afcf-c960162778f7/sirius_stratus_6_satellite_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f310db-785f-4575-9362-d4a7e1dd8125/zeruvepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c79487-bc73-4f6f-ba17-f540b783a62f/38781025469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c77ee0-da85-4e6b-8467-9bd76af8f656/manual_reloj_casio_aq-s800w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11bd573a-940b-4c9f-a6c0-606cc1c01d74/dell_optiplex_790_graphics_drivers_download_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6702ea6-e2be-401e-993e-b34c41fd71d6/18130998924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56fbb74-b370-4956-9bed-0765dda7da38/40132087895.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb737bb-34fa-4e8e-89d1-d4470f73894c/how_to_fix_a_computer_processor.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_off00012afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFD 5396 bytes
SHA-256: 8d64af82053f44244b9749b3fbee546f68b0a947e8c21d4284b58330bd94f856
font_01_sfnt_off00013d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D48 11740 bytes
SHA-256: 53d898cca0d4fcca11d789cd00eae72dae7dd09132ef02d4a3ef1797bb175010
font_02_sfnt_off00016595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16595 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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