Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f8226ff4d306f4…

MALICIOUS

PDF

76.6 KB Created: 2021-05-10 18:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13c5ace4f2df3c5b330203fb2712c098 SHA-1: 9c9efa7930542e9b4dd19d000a83a406471eacd6 SHA-256: 18f8226ff4d306f4f9591f01faf0ddc744f216f8526ab91f4a7590675912ec9e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://resalured.ru/strik', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of the external URI suggests the primary goal is to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://resalured.ru/strik?utm_term=what%2527s+a+halligan
    • https://cdn.sqhk.co/kewawukufiju/idwrYjd/68365583900.pdf
    • https://cdn.sqhk.co/kunimanujage/iiHhhje/bangla_voice_keyboard_for_iphone.pdf
    • https://cdn.sqhk.co/vagewovupug/pifjgIf/46404315132.pdf
    • http://mevukavotidu.getenjoyment.net/82502778946.pdf
    • http://bivaxopepukoxi.getenjoyment.net/acordes_de_acordeon_de_botones_en_sol.pdf
    • http://juponuziwotaga.mywebcommunity.org/30278351854.pdf
    • http://rulajamizap.getenjoyment.net/45721295944.pdf
    • https://cdn.sqhk.co/naxetimi/ignhbWr/shading_regions_inequalities_worksheet.pdf
    • https://cdn.sqhk.co/talexadu/cgixieK/duxovubinagakezedene.pdf
    • http://dujojiwasemob.mywebcommunity.org/66160020771.pdf
    • https://cdn.sqhk.co/nawakema/BQChPib/42265721331.pdf
    • https://cdn.sqhk.co/fakineduxafe/aieBChb/nostalgia_ice_cream_maker_recipes_peach.pdf
    • http://xuzotudaraderuf.mypressonline.com/gajeba.pdf
    • http://vowujebotoza.mywebcommunity.org/gupemovakozubine.pdf
    • https://cdn.sqhk.co/midipijikami/njaZpje/star_traders_frontiers_explorer_build.pdf
    • http://gunofixe.medianewsonline.com/12082994172.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wijotifiku.rf.gd/mathematica_ubuntu_free.pdf
    • http://ludilisi.epizy.com/54060900377.pdf
    • http://dovobol.epizy.com/backtrackit_mod_apk.pdf
    • http://zuriromaruwo.epizy.com/karin_slaughter_blindsighted.pdf
    • http://jatugeset.atwebpages.com/bank_peon_exam_paper_in_marathi.pdf
    • http://duzewinabo.epizy.com/jegifamelasiwa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef15.bin
b0781626bca17d47158ddf6209340c2e452a70e653100422ad7b7a77edace28c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF15 4900 bytes
font_01_sfnt_off0000ffd2.bin
8b79fa8dec1481bcece374301adbf357dd4590ef07ca3f6b756b2b862335229f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 10996 bytes