Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c9cb0e1d8d1ff3…

MALICIOUS

PDF

64.8 KB Created: 2020-11-27 08:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f9e9550e7cabe884e8858ddf1aa2c642 SHA-1: 96412672d16deef6d62e72505a3ece2c38665f24 SHA-256: 28c9cb0e1d8d1ff3c868df1b10eb4ac194dc4bd1e943fb5a3b4117ac81ca35f3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for song lyrics, indicating a phishing or social engineering lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site for further exploitation. No scripts were extracted, but the presence of an external URI points towards a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/wb?keyword=lagu%20air%20supply%20goodbye%20lirik PDF link annotation
    • https://zovijopafirol.weebly.com/uploads/1/3/4/6/134630452/lefuzafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5f9762cee8344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_5fb4449d8b411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478402/normal_5fb401bc0adf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8f1575f2a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5fb6bbddac52d.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/xomepixo/95276779580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17152e83-3343-46d1-bd3d-aa3bda58e008/writing_logically_thinking_critically_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0371cda1-f6fc-4e3c-b3da-f59246ba7602/pyromancer_build_guide_vermintide_2.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/logiciel_gratuit_pour_assembler.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/brahmi_script_information.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/wabapotasogolerexusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb28d534-b590-4039-850d-188d4cbad8d6/30111423359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f822d50f-82f2-4a67-8fec-bd79121bcd01/changeling_lost_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/lugegusifuvopog.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/cds_exam_ota_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/nirego.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_off0000c1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B3 5376 bytes
SHA-256: fcdcaeba0efe3f94e1ead7cc7d5ef416807a70e6dac6036de9ce621cc9ccf991
font_01_sfnt_off0000d413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD413 10048 bytes
SHA-256: 31ef803e3488f0ec2c8f26ca5fce58e7124c78fb08a835fd43ae68286de158d9

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