Malicious PDF — malware analysis report

Static analysis result for SHA-256 b319b7108670a8ba…

MALICIOUS

PDF

74.3 KB Created: 2021-04-16 10:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a9e5a2b5ba8580963048a8a9c4e56ce4 SHA-1: 99d319945499a791f07b8cbb3afb3f05f0060172 SHA-256: b319b7108670a8bae7c4be42e4d52d5bc3c8cdd1478ddcf991f50f5555e29086
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=do+garage+remote+controls+have+batteries PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426066/normal_603a0a0febae7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389127/normal_5ffb5345b171b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_6052db95d2d5d.pdfIn PDF document text
    • https://cdn.sqhk.co/dimusokobab/LjeGjaH/zekabejagataga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369640/normal_5ffcb8a813303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_5fd9b86660e2f.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/icR72n5/xajerevewubebevima.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/glgeVE5/game_show_buzzers_for_sale.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/mawesenasijoser/kexefonulomita.pdfIn PDF document text
    • https://204833c8-abda-4421-8777-5048ee7dd919.filesusr.com/ugd/e30b7a_0e2b16fd728d4ae5b8db1f530171188f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/232cbef9-71a9-4b49-8ff7-2ca6f420c9f9/rival_ice_cream_maker_parts_model_8605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a29ec1b-3b33-4c81-92e5-ad617d08949f/fernando_alonso_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/gadolexutewegubanikadom.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/python_pip_install_windows.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_717e8a52b6c44dab9bd01f15d823ade2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/putelekireza/47420452569.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/kenmore_washing_machine_parts_winnipeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae362bc-4bff-4a23-9a85-c754ce1c4b27/kenwood_ts-480_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed136b1-77b9-41b4-ad9c-c93d6041e394/bersa_firestorm_380_9_round_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/19473151094.pdfIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_7a903cdf7dd445379815912585f2b87f.pdf?index=trueIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_8af2066f0bff4976866d2da35d8239ba.pdf?index=trueIn 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_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 5412 bytes
SHA-256: a3b30213b8c4c118eadc3cd0c75ca6d439cc73941e492e2e9394923cfb31729c
font_01_sfnt_off0000f6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D4 10924 bytes
SHA-256: 4f222c4e5548937e89cc7618588a5a3d45386ce3eea1e8421e8e4d8c32a85ef4

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