Malicious PDF — malware analysis report

Static analysis result for SHA-256 6997b0714acedf87…

MALICIOUS

PDF

68.9 KB Created: 2021-03-24 00:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58bd24ed5167b3d7c6c908c4176b6f30 SHA-1: b72507a6911a385a12b13dd9ab389d0e7480b159 SHA-256: 6997b0714acedf872be872fc6d844c81df7d282d8c31131327aeef4ac6163a2d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('maypoin.ru') that is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute various malicious documents. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://maypoin.ru/award?keyword=system+analysis+and+design+notes+for+bba+pdf
    • http://kapusta.pro/gizizuvusuds5osw.pdf
    • http://moymagazin.xyz/hario_mill_slim_manual_grinder7g7e7.pdf
    • http://bluebadgeform.com/selabesatemojukibb898.pdf
    • http://1pokypki.website/16008882089sodyq.pdf
    • http://instapodarok.site/crossword_clues_answers_frees5zs7.pdf
    • http://justamorem.com/97761693622jzk1z.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_a2ac818ceaf243a797f96cfedac234e6.pdf?index=true
    • https://cdd249b8-77b1-4a94-b024-8995efe4d959.filesusr.com/ugd/d394ff_7e3544f018e94709a252584362b58e93.pdf?index=true
    • https://uploads.strikinglycdn.com/files/27e7bc60-3a39-4a8b-810a-f9df0b92865e/how_to_draw_a_dog_simple.pdf
    • https://uploads.strikinglycdn.com/files/859eade1-84e0-4e45-8e73-161926b6f21e/can_you_renew_your_drivers_license_online_in_mississippi.pdf
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_19805bf4578040f3bd5ba10900fa1ca7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cb390662-2ac8-4d55-b70a-400a41552ce3/97550678126.pdf
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_5e125ba1146c468e9b157d21bf9a6c1f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dd4791b5-632a-4b03-963b-f2be449654d0/bodugumakufaganuxi.pdf
    • https://uploads.strikinglycdn.com/files/2e5f1f3d-5c90-4f36-86f0-4155931bba1e/json_simple_tutorial_java.pdf
    • https://uploads.strikinglycdn.com/files/368ca065-d86c-4851-991a-e23885e753e6/40435827927.pdf
    • https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_7e26eddae338493da41dcec0fbefb3ab.pdf?index=true
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_f9a669881cd74c5b90f320aba5df8e2c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/08444a7c-45c1-4f85-bb1a-49014815cb78/stop_saying_youre_fine_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/580aa9c5-1645-4d5c-b7c2-608a5ab4357b/how_to_connect_hp_ultraslim_docking_station_to_monitor.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_off0000ce07.bin
ef14f870b17847720da13b69102c628f4e75232b9025d8141afd11f22e3b97f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE07 5704 bytes
font_01_sfnt_off0000e15f.bin
03858c8ddbd8291e56581f82b60f0860585d41efab033d9259051373e2c0ac1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 10836 bytes

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