Malicious PDF — malware analysis report

Static analysis result for SHA-256 e977b5986dc2965f…

MALICIOUS

PDF

71.9 KB Created: 2021-06-07 20:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9f407dcc9208e3a7d0874d2be411f72b SHA-1: 684b311d6b81d25224183772761c55c33da28a46 SHA-256: e977b5986dc2965fa8e03722aec6f5371298a4fe1a94ea184290422ea0c72246
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which point to disposable hosting and are designed to appear as search results. The primary malicious URL, https://queure.ru/pbw?utm_term=how+do+i+file+for+unemployment+with+a+1099, is presented as a lure for unemployment benefit information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://queure.ru/pbw?utm_term=how+do+i+file+for+unemployment+with+a+1099 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405946/normal_6022881e2b8a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427504/normal_5fc7c7b9d6a83.pdfIn PDF document text
    • https://wemogejivaje.weebly.com/uploads/1/3/1/0/131070934/3678315.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/vukasetenesoxame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_60170a15625ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144558747/93492377376.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144464580/how_do_i_arrange_an_uber_ride_for_someone_else.pdfIn PDF document text
    • http://magogopowo.pbworks.com/w/file/fetch/144460107/how_to_change_a_thermal_fuse_on_a_whirlpool_duet_dryer.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/50989855438.pdfIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144461709/minecraft_iron_man_mod_download.pdfIn PDF document text
    • http://pebolokunaz.pbworks.com/w/file/fetch/144616308/wekizenot.pdfIn PDF document text
    • http://fuzobonesujo.pbworks.com/f/puvadudafefuxo.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144708291/what_is_the_shatter_me_book_series_about.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/f/ray_tracing_shaders_minecraft_java_download.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/w/file/fetch/144512256/59377084894.pdfIn PDF document text
    • http://redelaw.pbworks.com/f/how_can_i_help_during_covid_19_in_my_community.pdfIn PDF document text
    • http://garigor.pbworks.com/f/mugasanipapogax.pdfIn PDF document text
    • http://gitixofipoxu.pbworks.com/f/causative_form_exerciseshave_something_done.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144412167/how_to_connect_ue_boom_to_new_phone.pdfIn PDF document text
    • http://gitizuxob.pbworks.com/f/13837054817.pdfIn PDF document text
    • http://mokapuv.pbworks.com/w/file/fetch/144709905/89842117603.pdfIn PDF document text
    • http://muxopal.pbworks.com/f/funciones_del_tronco_enceflico.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/rudopudixizokotebiro.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_off0000db79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB79 5608 bytes
SHA-256: 43cfc5ddb555c64d0cb995df128bee8180f14b7b35b400c8736c4b4644869302
font_01_sfnt_off0000ee7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7C 10396 bytes
SHA-256: 8d53d1601e0d128a9c56587afd7f24c4139094722c3a6266f0888b0babba4f9e

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