Malicious PDF — malware analysis report

Static analysis result for SHA-256 298eb03cfad315da…

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 06:26:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f4f5e26099fc6dfc476e9f7fbb36f3cd SHA-1: 9ef19d1ee16226201cc934658c5a9972c669b274 SHA-256: 298eb03cfad315daf7f0b1d1ba6cf2fd24582d628b37b687aef5df46d526d3e2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to unknown or potentially malicious domains, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=ar+15+accessories+forward+grip PDF link annotation
    • http://daating19.site/wekurafowidavibtdjeo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_604a1abec854f.pdfIn PDF document text
    • http://on24-system.club/ayyappa_telugu_video_songs_freezwyv8.pdfIn PDF document text
    • http://mybatut.store/jozenujoqvsa9.pdfIn PDF document text
    • http://prizinsta24.space/5-3_word_problem_practice_polynomial_functionsi5x4r.pdfIn PDF document text
    • http://presentinsta.online/96664581438j4uvm.pdfIn PDF document text
    • http://jivopifavu.22web.org/io._appium._java_client._android._androiddriver_maven_dependency.pdfIn PDF document text
    • http://pokemonrivals.online/what_is_the_color_trend_for_2021jjdjt.pdfIn PDF document text
    • http://labincom-med.ru/rt-ac87u_factory_resetfsiv0.pdfIn PDF document text
    • http://fojukuju.iblogger.org/nujebisufoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_603e2d506bff4.pdfIn PDF document text
    • http://2220202.ru/23473082292fmvpv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476564/normal_5fdd974b7626e.pdfIn PDF document text
    • http://ludozikime.22web.org/35251249457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_abfddb714d7d40dc82b45370679975f7.pdf?index=trueIn PDF document text
    • http://peworesafasar.epizy.com/89418484502.pdfIn PDF document text
    • http://tofarogupa.rf.gd/45379761884.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_ba77e7a81f7c4924836fbebe0f5023f9.pdf?index=trueIn PDF document text
    • http://xelemuxegerupob.rf.gd/derivative_of_inverse_trig_functions_calculator.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_027790461c0f483bbcbaaf16f2b41946.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_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 5548 bytes
SHA-256: 92347f2c66f07c339482880566e3d3451bde2b85b5c38be5e84144a65347b068
font_01_sfnt_off000104a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A8 11836 bytes
SHA-256: 42c1db2ca3d82a9df2650f3da057474f666dd3ebf5a28ac627c769a5ff8699cf

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