Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55839b2563ea063…

MALICIOUS

PDF

76.1 KB Created: 2021-03-07 20:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f23642ed2a9fa81c3138b2463bfba5b SHA-1: 230f0722a41efa631f9bafe0c2e291937a33e00a SHA-256: d55839b2563ea0637093ddfbb0543a51f5354d189fd0d0d119e81e5daa059b6a
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links for SEO manipulation or malicious redirection. One prominent URL, 'https://botokaw.ru/wix?keyword=live+nettv+apk+download+for+android', appears to be a lure for downloading software. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the idea of a deceptive download attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=live+nettv+apk+download+for+android
    • http://nubilofanekib.mygamesonline.org/descargar_driver_hp_deskjet_3050_windows_10_64_bits.pdf
    • https://cdn.sqhk.co/wesaduleb/ia1kijg/7862548554.pdf
    • https://cdn.sqhk.co/pawiwodogu/9ginwSs/spc_statistical_process_control.pdf
    • https://cdn.sqhk.co/bamebuxi/egjpjgL/octopus_squid_and_cuttlefish_book.pdf
    • http://jusukigib.sportsontheweb.net/what_is_not_an_example_of_critical_thinking.pdf
    • https://cdn.sqhk.co/molavagew/migJAgg/idle_tap_airport_mod_apk_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gofiguj/33247805029.pdf
    • https://uploads.strikinglycdn.com/files/f5767f36-2ce7-4324-b8ad-e52d2874ebac/safometerezojujepokovigat.pdf
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_386acb98e8db4a29bd906d25b5bcb28e.pdf?index=true
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_06a08540bd0044fa9bf079e6c821d49c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1fb19d77-143a-42c9-bcd4-9ebbed6a37e5/jevejabojozoza.pdf
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_c0d5c4675e5549cd810235aedc032270.pdf?index=true
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_0f41dcfed9fd457aa895105e6ba9e4b3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/38f1f661-9197-4bb0-80cb-fe3bd471ed76/zunagedafi.pdf
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_198ff2abd5ae489d8e17ef543aa15f28.pdf?index=true
    • https://uploads.strikinglycdn.com/files/55f47e62-3e35-4656-9efc-f5630b287bee/lerawivatumakuw.pdf
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_9e279cdfe6f94277affda93944537864.pdf?index=true
    • https://s3.amazonaws.com/rozebofukixus/67234892592.pdf
    • https://uploads.strikinglycdn.com/files/3e6b5f40-5365-4cea-96a1-0cf9d69e86c6/doxaselavegipemu.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_off0000ef0f.bin
944ae00772eb900883ad76edb87c349d0962e8e2962fe490424e1b49f3dc14fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 5012 bytes
font_01_sfnt_off0001004e.bin
6f3fcaeca9c4a532b5db2ffdaa5ed45a9abbfdbb7a04c104c5112144ae03d202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 10196 bytes

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