Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd00fae73cbf7f89…

MALICIOUS

PDF

81.2 KB Created: 2021-04-26 14:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 16a30eadf1ac0e462c0f76c85d23a386 SHA-1: 6f15d9f869a2a7f773af4d17cd66110940e0a6d9 SHA-256: fd00fae73cbf7f89f16196e79e4d7e4db899a745c3044479e6a840eb8a987762
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the document's structure and embedded links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=are+samsung+washing+machines+any+good PDF link annotation
    • http://pirewarekow.mywebcommunity.org/wegerirebewuvuz.pdfIn PDF document text
    • http://sait-ok.ru/android_studio_requirements_windows_7h6siv.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/xizirerenazakelalajadurot.pdfIn PDF document text
    • http://pearhaidhr.fun/how_to_assemble_ikea_malm_twin_bedm583j.pdfIn PDF document text
    • http://dapovevi.mywebcommunity.org/nusudidip.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/graphing_slope_intercept_form_worksheet.pdfIn PDF document text
    • http://kersita.space/raterguk3e.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/manual_de_impresora_samsung_xpress_m2835dw.pdfIn PDF document text
    • http://vizionsmc.net/70626233076yfawu.pdfIn PDF document text
    • http://magazinrf.xyz/gliosis_in_mri_reportewz4l.pdfIn PDF document text
    • http://esclub.pro/wobufenet7p0.pdfIn PDF document text
    • http://plusstore.pro/freetvkey._com_telephone_numberze6j1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/nowejogoso.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/1955449103.pdfIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_e7d2c3a5f98644669da9063dcba06e11.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_95c3300e948d4e68b7633925bad4736f.pdf?index=trueIn PDF document text
    • http://jagomizaf.atwebpages.com/24258582583.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/update_whatsapp_messenger_apk.pdfIn PDF document text
    • https://0029a690-d003-4268-bdc7-e74daa5a0415.filesusr.com/ugd/a4b355_dfa589167ae14b588fddbaf53a8c1ed2.pdf?index=trueIn PDF document text
    • https://0c43c058-97b3-435a-b041-a9f001bfa883.filesusr.com/ugd/791d74_a6b24c16f4fb44da96b6b77b17a72bf3.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_654d25c00bb0489c8e21d6924ba44e34.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_off00010090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10090 5504 bytes
SHA-256: 7879196db8267460a53fbe08867ba9b22a598effe53fbcf666c93d439049a139
font_01_sfnt_off00011332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11332 10692 bytes
SHA-256: 0b71715a794316fcd7dca9b40ac987b73900625aaf76f0c0c3a5c619e4bebe59

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