Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc48a5ebc9f6a0cd…

MALICIOUS

PDF

70.8 KB Created: 2021-03-29 05:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 87d3041b11d9aa62ea9d15dd54b72a2a SHA-1: ae54b3894c9044c1d0c2e78214fe786a8008a3b3 SHA-256: bc48a5ebc9f6a0cd882b0a660a05e49a25e30bd6029b43a6741bab26ee8b3f8c
126 Risk Score

Malware Insights

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

The file is a PDF that contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and link farm heuristics suggests the primary goal is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/aws?utm_term=pearl+of+great+price+student+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/firokizita/ijaAitt/jurassic_survival_island_2_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/wepevuwu/jiaViiH/best_music_player_windows_10_2020.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/turbo_manager_app_for_android.pdfIn PDF document text
    • http://kersita.space/xesuvudibugisibutajonak6rg1.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/hAUWgfJ/89167271731.pdfIn PDF document text
    • http://moresukko.ru/speed_queen_fl_error8gh6s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_6045f0b9d6816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_604fa10a730aa.pdfIn PDF document text
    • https://cdn.sqhk.co/papowepu/1E3gjdW/43757715914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490272/normal_605dacd0cef15.pdfIn PDF document text
    • http://prechambre.xyz/dodadukexugorasifefudozawdh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6525eaf8-9a42-4119-9fb4-c3d475b3b78e.filesusr.com/ugd/80bfa9_d4cd5d3e1fcc491b8a345c103d0ffdaf.pdf?index=trueIn PDF document text
    • https://09d7e2b9-79a3-4876-9e00-73a1ba4263a4.filesusr.com/ugd/92fcd7_e6cb8bee3ac94355b75d04a256ab3152.pdf?index=trueIn PDF document text
    • http://zavivemigowoson.epizy.com/aiou_assignment_page.pdfIn PDF document text
    • http://jijitereni.rf.gd/la_boite_a_merveille_en_franais.pdfIn PDF document text
    • http://karababeso.rf.gd/13512909992.pdfIn PDF document text
    • http://rofijig.rf.gd/manual_i2_analyst_s_notebook_en_espaol.pdfIn PDF document text
    • http://jizuperuxe.epizy.com/redivififidanabo.pdfIn PDF document text
    • http://sutobeniwemezet.rf.gd/railway_group_d_maths_syllabus.pdfIn PDF document text
    • http://feluwagosipo.rf.gd/life_science_grade_11_study_guide.pdfIn PDF document text
    • https://cd65756b-a9c7-4cca-9498-1747a6459195.filesusr.com/ugd/05eb20_49ee10a97f374b07baa39f926a00d956.pdf?index=trueIn PDF document text
    • http://zujabazu.epizy.com/wanuwalubevideropepu.pdfIn PDF document text
    • http://gafiruxosu.rf.gd/how_to_use_harman_kardon_onyx_studio_4.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_19e90de92a9246669dc4e2b95f07d5fd.pdf?index=trueIn 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_off0000d82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82F 5476 bytes
SHA-256: 81efe57f3ee9ff5665286042b43d48e3122c11634625e257d3e74f2f25c829a1
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 10076 bytes
SHA-256: 4dd0363a56c894e45515db246ae36b97692c76cf0642c7dd6a53a48e6c09bd39

Open this report in the interactive analyzer, or submit your own file for analysis.