Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9820f2c9eb9760…

MALICIOUS

PDF

85.1 KB Created: 2021-04-13 23:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b21d8c13665361273c1eda41c1d16eae SHA-1: 9e85d0ac397bb4b4cda931a7d4699f6cb796d75f SHA-256: dd9820f2c9eb9760cacaa4271f1822205123ec48ba14cc8687c329b4753c1dd3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it's part of a link farm designed to redirect users to potentially malicious websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest this document is used for phishing or distributing further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=how+many+sacred+geometry+shapes+are+there PDF link annotation
    • https://cdn.sqhk.co/gulezepu/5ijjhcV/vacation_leave_application_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418590/normal_603d10bbc6039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_6054c2911aaf6.pdfIn PDF document text
    • https://cdn.sqhk.co/lapotalodige/jhc5TTW/king_herod_s_song_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/wemitupu/JigIZEM/77543161426.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/f8gfif0/jotulesovam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471509/normal_6040591fb693c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6019105db8192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_606d58078f433.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/dinisemowoge/nutoxuvirovubusogaze.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/why_is_world_war_z_rated_pg_13.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_5cee8039e2c648f2a80b749c1415b5d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mutirexa/dorothy_must_die_plot_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09df37d-c0d0-4408-bc06-af06a59464d9/97637147035.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_0c21e6dda67e46bc9e16e2d6737b6782.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/words_their_way_spelling_test_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b516d15-53c5-4037-8d32-3a7fff2da4f5/37290956054.pdfIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_d0b468c535dd4c5ab39e30c61a00c40d.pdf?index=trueIn PDF document text
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_205893353fc24ea28bce40ac3eac25e6.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_3ef70c1c84e54511810bbbee7162a6e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/54757856757.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_off0000f77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77F 5608 bytes
SHA-256: fda6cfb7dc6856978fcc8273f39549929af18dd313bd977120153147bae29564
font_01_sfnt_off00010a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7D 10876 bytes
SHA-256: 1bc8ca6b5160e39847a6bcd027cb00301f2167ae056eea6bb778f160f44bfdc0
font_02_sfnt_off00012fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBF 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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