Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47c906f64b44c32…

MALICIOUS

PDF

70.9 KB Created: 2021-03-09 02:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c16347d262825384910772dbf48ebc9f SHA-1: 33ec871e777ba1756f321d38925f7d40f672103c SHA-256: d47c906f64b44c326824dd14e97840bbeaa1188a5e4f580df73c34e54fc462f2
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true malicious intent by using a large number of links on potentially compromised or low-reputation hosting. The presence of external URIs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7642

Heuristics 4

  • 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
  • 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://bologen.ru/award?keyword=a+b+c+murders+pdf PDF link annotation
    • https://cdn.sqhk.co/feripamapuv/5nhihfi/inside_the_box_book_summary.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/17567517099.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/gcUthaX/mapeso.pdfIn PDF document text
    • http://3gusevshop.website/cambios_sociales_en_el_embarazojwfxh.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/31496925192.pdfIn PDF document text
    • http://katagonubazi.22web.org/vavititakosamitov.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/nupugil.pdfIn PDF document text
    • http://getbuiss.online/lolobejalexi08qx5.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/bgiaPSl/android_gta_vice_city_game_cheat_code_keyboard.pdfIn PDF document text
    • https://cdn.sqhk.co/lusoxepero/hBykizJ/26490779979.pdfIn PDF document text
    • http://startbastar.online/g_shock_ga100cm_5adrfga22.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/hdjfNin/sogiwazoxazovinugana.pdfIn PDF document text
    • http://stopro.store/how_interior_design_can_change_the_world1fsf2.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/4591365474.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuwajuzi.epizy.com/77807050285.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/the_entertainer_ukulele_tab.pdfIn PDF document text
    • http://kesekerezox.epizy.com/fitbit_charge_3_manuale_italiano.pdfIn PDF document text
    • http://fobifuv.epizy.com/94323946782.pdfIn 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_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 4724 bytes
SHA-256: 6e6cc28279e231030d1f95eab04aa823ee7fbc2c60371b69f8b7d5a3fd0bcb01
font_01_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 10408 bytes
SHA-256: f9d5f364815b6f5c651a9c7043e1168023452b12e3ab434e5ec2b5050a0111dc