Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3509f37c122d7b…

MALICIOUS

PDF

79.4 KB Created: 2021-03-22 03:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 579ac136079b3fca0bdbb958c326e219 SHA-1: 72ed3b1cfbcdbe94037e5b16ceb07677bf050389 SHA-256: fb3509f37c122d7bb48d21314c7d477c47226436822bf80f4b109417e7018dcb
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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
  • 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://yafferge.ru/award?keyword=past+simple+regular+verbs+worksheets+elementary+pdf
    • https://cdn.sqhk.co/jixuvepabu/4Bhd6WG/22844557093.pdf
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/lasewi.pdf
    • http://minuzin.22web.org/sovebowajubodiwopob.pdf
    • http://contentmedialiteracy.com/84465566397uwt8i.pdf
    • https://cdn.sqhk.co/jozazixefuf/ajhyheC/71870000112.pdf
    • https://cdn.sqhk.co/pikevasoze/WhbjeMA/duty_free_shop_t_galleria_bali.pdf
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/fawakewe.pdf
    • http://hot-money.fun/495910320343ag43.pdf
    • http://reactivaperu-viabcpi.com/nurudubenia6g0.pdf
    • https://cdn.sqhk.co/vafodagusun/befhdYT/dallas_indoor_skydiving_experience.pdf
    • http://alcexpress3.xyz/tor_browser_bundle_apkqazca.pdf
    • https://cdn.sqhk.co/bedazume/vCMb4hc/viridiana_alvarez_record_guinness.pdf
    • http://razvivatel.blog/asset_management_process_flow5m3kq.pdf
    • https://zoxofaduw.weebly.com/uploads/1/3/2/6/132683138/6850403.pdf
    • https://cdn.sqhk.co/moranunemuk/jhhKij3/buffer_area_meaning_in_bengali.pdf
    • https://cdn.sqhk.co/xegigujatefa/jiZvihh/acode_powerful_code_editor_pro.pdf
    • https://cdn.sqhk.co/sebutarukaw/jbidXn5/sufogodexikinazelulawuzu.pdf
    • https://cdn.sqhk.co/nodezaneripe/hicibMS/among_us_ps4_gameplay.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuxodiza.epizy.com/track_fedex_package_by_order_number.pdf
    • http://jagomizaf.atwebpages.com/ser_bachiller_preguntas.pdf
    • http://rogofideb.onlinewebshop.net/48836579217.pdf
    • http://vawerudarasikow.myartsonline.com/afmc_admission_circular_2020_19_download.pdf
    • http://kigitom.epizy.com/performax_3x21_belt_sander_review.pdf
    • http://vusoxererereli.epizy.com/backup_exec_20._4.pdf
    • http://wudofowukad.rf.gd/can_i_have_a_cup_of_tea_please_in_french.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c9.bin
4c47e609f5adedc322c66655e40929eea21266a2364b704f6d7b40a07cbad0b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C9 5912 bytes
font_01_sfnt_off0000f7d5.bin
308518662aefe3ee3ec3bbb345df54c1f960795a8fc9b9340250ac3b498af5a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 10184 bytes
font_02_sfnt_off00011ac0.bin
bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 16060 bytes

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