Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aed79aaad2b1540…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 01:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 87b73b570765ba5d1ceb6c5ed4489986 SHA-1: e3e04ac8b8998dc29fb8e39902e833e412f6c8c0 SHA-256: 6aed79aaad2b15404b6c114839d8bc55b576dcd4e3afdb26b24c0eb1c7e88f42
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a malicious intent to redirect users to potentially harmful sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/strik?utm_term=raymond+buckland+romani+tarot PDF link annotation
    • http://xapunubezes.iblogger.org/5_yoga_asanas_with_pictures_and_names_in_hindi.pdfIn PDF document text
    • http://ragananutirud.iblogger.org/atomic_habits_book_summary.pdfIn PDF document text
    • http://zokumujanuni.iblogger.org/husqvarna_61_chainsaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giverez.epizy.com/77040513434.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_decf9baf9c514484bfbfff1f39e008d8.pdf?index=trueIn PDF document text
    • http://kepatuzazavew.epizy.com/excel_dashboard_templates.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_abddc3c5073e4ccfba30ddd571529e62.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_573ebb9bc835483bbe18fe20d740e548.pdf?index=trueIn PDF document text
    • http://betupaxomivokab.epizy.com/26852159868.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_3d02d20a0e1b477183dba350e0212d41.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c205fbd3-49ff-4ecf-b033-4357a8e058cf/rebepazexenokomegikim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806b6744-6bba-43e6-9803-eb7e37a3b164/68927110708.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_420feb46a50149bcbf554cbe4213ef95.pdf?index=trueIn PDF document text
    • http://zavatuwobo.rf.gd/vafedoka.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_12f08f393afd4939ad42d9ea6458c941.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2c3e2c-1847-4f66-8bee-1a9fcea313f3/why_is_my_whirlpool_water_softener_overflowing.pdfIn PDF document text
    • http://devuzobek.rf.gd/tuvupunufu.pdfIn PDF document text
    • http://zixobotivi.epizy.com/libro_el_cerebro_femenino_gratis.pdfIn PDF document text
    • http://wuwovedivaz.rf.gd/sharp_network_scanner_tool_version_3._3.pdfIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_aa4ce62c41ab4e4bac500a43d87db0c8.pdf?index=trueIn PDF document text
    • http://robefopatobut.epizy.com/seven_wonders_of_the_world_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38a15c8-9690-436d-bb53-a705610d86c3/d-link_powerline_av500_passthrough_adapter_starter_kit.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_off0000f4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C6 5220 bytes
SHA-256: 8c2038290b915f3bd429682ea5968f2215a2075510a264f6e535ac5a245297f9
font_01_sfnt_off00010681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10681 11024 bytes
SHA-256: f2d657abb9c31ba9083755170997af62b2ab73c4475996aa7100058ae5a291f2