Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f22d114779f434…

MALICIOUS

PDF

89.9 KB Created: 2021-03-24 23:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 31672f880c8737b35282a0d1532edc05 SHA-1: 05b706c95b2545053dffa1e25ebeaeca8dc22787 SHA-256: 45f22d114779f434e10f17e2e021b45dcb3141f374d4f99f1f2462a1c3734af2
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains keywords related to games and the authoring application, indicating a potential lure to disguise malicious intent. The presence of external URIs and a link farm strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 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.
  • 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://nipisod.ru/wix?keyword=zombie+apocalypse+hacked+unblocked+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467576/normal_5fd7d64fa2597.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/tadutufirosigasegepakuze.pdfIn PDF document text
    • http://nafugelinev.iblogger.org/abrg_d_histoire_des_mathmatiques.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462694/normal_605ad076226ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5fd655726f763.pdfIn PDF document text
    • http://vagoneviwesum.66ghz.com/85225492900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_ddea7b3d7ea34d2aa6f620e1fda0e401.pdf?index=trueIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_940ad06a6cfe4f989cb55e28dde04bae.pdf?index=trueIn PDF document text
    • http://wudafozejuniv.rf.gd/praia_do_carvalhal_surf_report.pdfIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_636c0e8ebd8644c2910be90fdc2e5c9d.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_0a385b8ace3f4acea6a960c9feaa7e1a.pdf?index=trueIn PDF document text
    • http://beverotunege.epizy.com/interlaken_visit_guide.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_135392ae561f42a28195f253843cc86f.pdf?index=trueIn PDF document text
    • http://jivupiputugafi.epizy.com/swot_analysis_report_example.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/biogeochemistry_schlesinger.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_84d88a2adf6a4ca4a736c03a3a47dfe1.pdf?index=trueIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_99fb922496fc4558917bb217b9be21fa.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_77a739840230432d853e5c8de974240c.pdf?index=trueIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_0f19f164647f47f986c94c13a60edb62.pdf?index=trueIn PDF document text
    • http://botarukekim.rf.gd/wevufamomo.pdfIn PDF document text
    • http://sufiwufefolama.rf.gd/aviation_logistics.pdfIn PDF document text
    • http://fiwibijamexol.rf.gd/limisow.pdfIn PDF document text
    • http://wuxodevidupibe.epizy.com/english_chinese_medical_dictionary_free.pdfIn PDF document text
    • http://dapizifotokom.epizy.com/wurutononiruzazisuwiraf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6D 5656 bytes
SHA-256: f9adb9fb26d36ae4b2a0a82b5cf084ec541241c8485dcfedb46697c5c3417f77
font_01_sfnt_off00011d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D94 11308 bytes
SHA-256: fe7ae9b33105ac304b1f6311c202b0ba03fc8c559c622d03fee551498a5d1510
font_02_sfnt_off0001444a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444A 16096 bytes
SHA-256: 19ece852f40bc3924311adfba3d43e092a25194c6d3b6e3d178a0c38e0302bb2

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