Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8f79c4d096faa4…

MALICIOUS

PDF

89.3 KB Created: 2021-05-18 08:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b2357a8fe7fbfb09367eb9522b111c7c SHA-1: 552434c3ce42fba883fc8d674f3968c1a9a61714 SHA-256: fe8f79c4d096faa4ba377f8508ae6d72d728040fed87119594839baed7a363a3
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=roblox+asset+downloader+fordownloader PDF link annotation
    • http://negodebozebe.iblogger.org/71369723560.pdfIn PDF document text
    • http://jojalipubawil.22web.org/25932505076.pdfIn PDF document text
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/geworape.pdfIn PDF document text
    • http://tifowudadu.22web.org/nesasomufexisozugevo.pdfIn PDF document text
    • http://fapegag.22web.org/zibogizosubemadu.pdfIn PDF document text
    • http://gepuladetageton.22web.org/58295198830.pdfIn PDF document text
    • https://fedoxamanisoru.weebly.com/uploads/1/3/4/6/134668372/8582758.pdfIn PDF document text
    • http://josisenepezu.iblogger.org/vusuxumikalovaken.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d63cb08d-cfce-4754-9a07-700e74aa8e32/why_wont_imovie_work_on_my_iphone.pdfIn PDF document text
    • http://jamipuvulegaze.epizy.com/naluz.pdfIn PDF document text
    • http://nuwumexuxesi.epizy.com/business_writing_skills_books.pdfIn PDF document text
    • http://wujarid.epizy.com/affidavit_of_loss_id_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e70393c-1427-410f-ad19-c8cad6e04477/journey_to_the_center_of_the_earth_2_full_movie_in_hindi_dubbed_download_filmyzilla.pdfIn PDF document text
    • http://vatirefenezoma.epizy.com/rangkuman_biologi_sma.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/definicion_de_demografia.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/26871149351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed7df017-fde8-4426-9bb7-984b033768d8/maths_riddles_for_class_7_with_answers.pdfIn PDF document text
    • http://lufubapiworozil.epizy.com/30279637587.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/colon_cancer_nccn_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/non-_adjudicative_forms_of_adr.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/ladesonitoxedaragaruj.pdfIn PDF document text
    • http://jufodapopugor.rf.gd/voltage_regulation_of_transformer_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd8f47f-537f-4621-967d-b5977b3c3206/36777400227.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 4948 bytes
SHA-256: 2e63c7bc0636b40a58301e86a09c4e76c4546d9c5e1c631a1529b945e349ec0c
font_01_sfnt_off000122e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E2 11328 bytes
SHA-256: 0a18fe91acfd5516a1685f83e09a600f8550851628951ecd596a02142f7b0fc3
font_02_sfnt_off00014976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14976 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f