Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c2400b69050436…

MALICIOUS

PDF

88.3 KB Created: 2021-02-28 22:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 522b43d81d5b1bee3d89e6c97d789a1f SHA-1: ede3f396c47a8139df13d795af4a39c23e84125a SHA-256: e7c2400b69050436437e955ab0a003d41c645fdb135ccb7412261f3be53e6d48
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains external URIs and is structured as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains references to a 'Barska biometric safe manual', a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=barska+biometric+safe+manual PDF link annotation
    • http://gagivukamuw.getenjoyment.net/1260003098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382408/normal_5ff90a4f483c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_60383a60afeb4.pdfIn PDF document text
    • http://titanof-filtr.ru/rusafasafonukotar0yrdo.pdfIn PDF document text
    • http://gtmedis.com/how_to_pair_my_pebble_watchf03pf.pdfIn PDF document text
    • https://zopatiselinijil.weebly.com/uploads/1/3/4/7/134758238/07f745c8d.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/kajodedaduvijilo.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/kedexuz.pdfIn PDF document text
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/968b382cbf.pdfIn PDF document text
    • http://1s.london/rode_nt1_vs_akg_p420qlxof.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/gowasivumifob-ragirax-nakuzixuzijok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_600f13fd150b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_600c8b2e7cab3.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/6750862.pdfIn PDF document text
    • http://romeita.fun/8989028125621pko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejuzilawa.rf.gd/serugut.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/which_country_invented_gunpowder.pdfIn PDF document text
    • http://fapudimilo.rf.gd/onclick_new_activity_android_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/latuzerava.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/sample_marketing_plan_template_word.pdfIn PDF document text
    • http://jarewixefokoxem.epizy.com/voyage_belek_golf_spa_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/cuanto_son_3_8_en_centimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/ceo_up.pdfIn PDF document text
    • http://ranitirunom.myartsonline.com/tecumseh_engines_history.pdfIn PDF document text
    • http://wekumut.epizy.com/44989468022.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A83 5280 bytes
SHA-256: c34777810da89125c65a3c5c1958381f5355ca0f0267f8ffb0044a4eb3cd9b9b
font_01_sfnt_off00012c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C67 11716 bytes
SHA-256: d2ab12128c216687ebd387312b901ab11523183be64b90ccc4172c1b3b78efe9

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