Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c7141b0c4367c8…

MALICIOUS

PDF

84.5 KB Created: 2021-02-14 01:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 053183d611624c79ce116f24fd145e72 SHA-1: ebbd92697f0139955573e44f4e1976fa5b8edb1a SHA-256: 00c7141b0c4367c8c48f40c8be4b28da5f4678b488281697629e40ee408141e4
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent. The primary lure appears to be a search result for 'my name birthday song free', directing users to a suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://baarspo.ru/wb?keyword=my%20name%20birthday%20song%20free PDF link annotation
    • https://cdn.sqhk.co/wewuxujudu/c7jgje5/66329101118.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/hbieHn4/nuclear_war_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/iiFibhg/9305452128.pdfIn PDF document text
    • http://shoes-storie.club/jesinimewijuwerzv.pdfIn PDF document text
    • http://tameenegypt.com/xuvadesepevemuzipusivif2qzpc.pdfIn PDF document text
    • http://lisifakus.66ghz.com/2566858979.pdfIn PDF document text
    • http://delalikifavaru.iblogger.org/kotuposeluzerazuzu.pdfIn PDF document text
    • http://magicwoolshop.com/296382945694ytee.pdfIn PDF document text
    • https://cdn.sqhk.co/xavipinav/Aieiase/nova_launcher_prime_apk_free_download_apk_mirror.pdfIn PDF document text
    • http://apsdd54gfv.xyz/brute_force_windows_8aswt8.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajura/iaChbie/jodigesirini.pdfIn PDF document text
    • http://menbp.online/35321967046f6qhc.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/if7PiaB/fazbear_friends_hd_wallpapers_2020_download.pdfIn PDF document text
    • http://xarusogu.22web.org/85525350154.pdfIn PDF document text
    • http://copyright-securityx.com/promissory_note_format_in_worduyl5u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/21760771791.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/pf_withdrawal_online_procedure.pdfIn PDF document text
    • http://koxaxinum.epizy.com/66275025788.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/corporate_business_powerpoint_templates_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C7 5536 bytes
SHA-256: 71bc6397511deb542a7c783322c7999f250b3f3793e84e0fb11da8c67bf1f7fb
font_01_sfnt_off0000ea84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA84 11000 bytes
SHA-256: c706243b9ec1fdfa0da27953bc72d8adf205975fe871fda9f2ba885b4f9d7e6d
font_02_sfnt_off00010fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE0 16132 bytes
SHA-256: 43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6
font_03_sfnt_off00012512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12512 10076 bytes
SHA-256: 8a8182a47f05b2a031d776337418ec257b6459e0961cf7dfe6d6f4752b60788b

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