Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bfeff4c3bbc3ea…

MALICIOUS

PDF

70.4 KB Created: 2021-03-18 12:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87e1ffaedc083a765de2362b4d233dff SHA-1: 45e04311eb718af76cb1c051f6d4335858f87bc9 SHA-256: a8bfeff4c3bbc3ead1171f4f4ae8603656289b2d0dad892a2f35eab69cb57eec
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, masquerading as a 'Volvo BM 430 PDF'. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs indicates an attempt to redirect the user to a malicious resource.

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://pelibifir.ru/award?keyword=volvo+bm+430+pdf
    • http://suvekitubexeso.getenjoyment.net/zafibelawusokanobuda.pdf
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/1910238.pdf
    • https://wirupexulabajes.weebly.com/uploads/1/3/5/3/135322132/e506a1.pdf
    • https://static.s123-cdn-static.com/uploads/4457005/normal_5fcbbad508f4d.pdf
    • http://vuzuwul.getenjoyment.net/zududap.pdf
    • https://cdn.sqhk.co/rizikodeni/gZXC3ZQ/20824186183.pdf
    • https://cdn.sqhk.co/lesepivir/3m5YYhd/bekhayali_full_audio_song.pdf
    • http://kulotufiw.mypressonline.com/libros_de_calabozos_y_dragones_en_espaol.pdf
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5fe21572126af.pdf
    • https://cdn-cms.f-static.net/uploads/4391903/normal_60268ea8ccc10.pdf
    • https://cdn.sqhk.co/lolajelor/hhidjbg/86232452572.pdf
    • https://cdn.sqhk.co/vudupapuj/dcge9hj/70940230445.pdf
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5fe4eb7ea31ec.pdf
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_cf828845d56049e98082ff37cdff934b.pdf?index=true
    • http://xotopusedewix.myartsonline.com/alimentacion_parenteral_en_recien_nacidos.pdf
    • https://uploads.strikinglycdn.com/files/b02a9bb1-73f3-416d-9fe6-26565f7c9359/how_to_install_swann_security_cameras.pdf
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_39b3249098ee4cbba5aae3dec45ced0a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2cf0898f-2215-40e2-bff1-098a4eed9978/probability_and_queuing_theory_notes.pdf
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_55c0c95b423f47b0b6d4bf4e2e690970.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8e3ee705-75ad-451d-b3fd-d57fd37fae3c/60828614940.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d476.bin
cf9b485463323f803c68bc3c0a9ad4704dbbcd36bfedeacca96a464ac75a711f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD476 5264 bytes
font_01_sfnt_off0000e663.bin
623b079d44db833e873d3bc552fb7b8b8bba732db91229ff75f7937abe646e5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 11532 bytes

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