Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d23454fd115f09…

MALICIOUS

PDF

74.9 KB Created: 2021-03-25 04:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 52cbde2c950cc91aba924828bd67aa1b SHA-1: 2933eaab82fe065905681f8522c9db1a4d38901d SHA-256: f2d23454fd115f09bbabfe88f03b1c0ffe9c46291094c4be161b3b48d9a76732
156 Risk Score

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=board+kings+hack+apk+2018 PDF link annotation
    • http://itverys.space/48335715787n9g0c.pdfIn PDF document text
    • http://begemot.space/the_darkest_minds_2_full_movie_in_hindi_downloadygo6k.pdfIn PDF document text
    • http://botefin.medianewsonline.com/los_personajes_que_participaron_en_la_independencia_de_mxico.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/4566784794e51tb.pdfIn PDF document text
    • http://trenketo.buzz/how_much_is_laptop_motherboard_replacementcq0ku.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/gewofabujuboaahwd.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/nazekisigiduz/max_lucado_net_worth_2018.pdfIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_20f4b5616f8645aab842e990730c9f96.pdf?index=trueIn PDF document text
    • http://senesijosezetu.myartsonline.com/nivumumuko.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/lagu_jantung_bergetar_getar.pdfIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_01038b609d28485083263ae1a1782647.pdf?index=trueIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_a07355f56e954c5b9a99c89dcfc55d2f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/holliston_ma_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/40244005399.pdfIn PDF document text
    • https://5c2cca0d-3a4e-48b0-93bf-8ac6c0c026cb.filesusr.com/ugd/271e65_c509084a8b51445db4bde28b52009f87.pdf?index=trueIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_f8d7bbff8d1b4a9ead36fb3479b799f3.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_off0000e5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BD 5936 bytes
SHA-256: 253b8cd3d98a40d4f4236c68a82c3459b141bb7b9f4675bf851293facd084e4d
font_01_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 10884 bytes
SHA-256: ae31a0eafd89d54213f8d5b96f1a744a71ba48b8120d5e371f480007b6d16df8

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