Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e66a79ef81a333…

MALICIOUS

PDF

86.2 KB Created: 2021-04-04 22:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 9729d9a9e99a2ed794228b5c80dcfc8f SHA-1: 45307a5276a577869be4553e81dd1118d73d76f8 SHA-256: 11e66a79ef81a33319642687dc5ea850f6d5187432e15388b6b4b5246dda3065
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'Harry potter video game 2020 nintendo switch', likely a lure to entice clicks. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious sites via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=harry+potter+video+game+2020+nintendo+switch In PDF document text
    • http://manybigs.space/41260972311wavmz.pdfIn PDF document text
    • https://cdn.sqhk.co/gejemizus/ieCieN3/117819846.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/52590025554.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/dexofu.pdfIn PDF document text
    • http://noxesim.iblogger.org/how_to_turn_on_adt_safewatch_pro_3000.pdfIn PDF document text
    • http://businesshelpservice.com/mexofudiboguda2hjcz.pdfIn PDF document text
    • http://xadebiwivupogof.iblogger.org/gerizaluziwanolakil.pdfIn PDF document text
    • https://cdn.sqhk.co/lexuxeza/hahfAic/city_racing_3d_game_download_for_windows_10.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/bumadapepim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_0cb8905c7ce44f7c8385fbe5f4e3723f.pdf?index=trueIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_25128382af784d7bb0866290f6acc795.pdf?index=trueIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_9263289da383478397399332c5e005ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/63570365522.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/android_studio_how_to_install_ndk.pdfIn PDF document text
    • http://dijuvunote.onlinewebshop.net/nikisojepetufizodo.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_72f6cf2a9c904cbaa5cafebcf891dae0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pezofut/364364301.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/xuwowup.pdfIn PDF document text
    • http://rameselutem.epizy.com/adobe_premiere_pro_download_free_full_version_hindi.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_da94fbce46854cd7952d57d4f9325f62.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_off00011291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11291 5944 bytes
SHA-256: adc00748632b89e3c31d56a7d021cce63a05a87544ec2f7ff717e45f989ff2c4
font_01_sfnt_off000126c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C2 10960 bytes
SHA-256: de49727ff57fab7a303d60bfa70eb2690baa291d0ac1db2118b2b3bb5a589e65

Open this report in the interactive analyzer, or submit your own file for analysis.