Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ade19d119e0cd4a…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 03:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0573336b217d0e01afe89b6f9fa67835 SHA-1: 663f211a0a737037d222aa46421675d0de69aff8 SHA-256: 2ade19d119e0cd4a7060a62ab769de172d30f62f88f7314d915b185c368ff557
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to suspicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers strongly indicate maliciousness. The PDF_SEO_LINK_FARM heuristic specifically calls out the mass external PDF link farm, suggesting a tactic to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=nabucco+overture+brass+quintet+pdf PDF link annotation
    • http://rosutob.getenjoyment.net/shark_navigator_lift_away_deluxe_nv360_26.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/23952125208.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/adobe_acrobat_reader_download.pdfIn PDF document text
    • http://kafofal.mygamesonline.org/what_is_personal_policy.pdfIn PDF document text
    • http://wojurimaxab.mywebcommunity.org/types_of_bilateral_tubal_ligation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_59c01ac140de4a05b5c8b8fe9e109888.pdf?index=trueIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_52bdbdb6ab6d4885ab5fa1af5bfb9cda.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxegu/71535093227.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/sap_analytics_cloud_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c29ffef-9115-404f-af0b-ac3d51ac356f/81991415711.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_a024926a407444bfb1ba42f73d936781.pdf?index=trueIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_a3a9c6b2ebf440b496ff2e31b7056fe3.pdf?index=trueIn PDF document text
    • https://694dae7a-2033-4a59-8b06-91ff4eec0774.filesusr.com/ugd/e1d58f_d2847166b0a24962a939ce84d4d5394a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/mefazisaseru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36c9d3d-07de-4c3f-82e8-d074cf42b824/neopost_in_300_series_change_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c515bf0-0e16-48a7-8fda-270d172dcf29/mofepotufusoroxovefaxe.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_acadc1fb23934a57822d5059888e6a70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/16638182711.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_6d5c3dd645554d63bad765dfe60c3f10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ece4cd5-a76d-4a5f-a670-5a09ad456fa8/27291089911.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/current_acls_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/academic_vocabulary_toolkit_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/zowezukuduwavalupevinafa.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_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 5412 bytes
SHA-256: 78a7c1cf661d898a96ee60891123e8208519734defc394a466fa84c45806801f
font_01_sfnt_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 10100 bytes
SHA-256: 244ccba528236f7ea51a6f6ba49cd756581f9bbe7f693ef78e7012144cdb5a46

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