Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c0c9811b157ff1…

MALICIOUS

PDF

69.4 KB Created: 2021-03-01 06:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 332801ca319b40e7fa00957a42768024 SHA-1: 6045fc4562a6b881589cf1b35f6eae8620f28cb0 SHA-256: 34c0c9811b157ff17f46cba25cf84520efb53f21d04f229c0ec76c44bc680d4e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV and a machine learning classifier flagged this PDF as malicious, specifically as a phishing or trojan variant. The embedded URL likely serves as a lure to a malicious site, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=finding+surface+area+of+composite+figures+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427811/normal_5fc7e7c7ab271.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496815/normal_5fce8aec1d020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_6010d3fc106ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412895/normal_5ff9292c33f43.pdfIn PDF document text
    • http://pro-konditer.com/58527434106okepq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_5fe6cd80437fb.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/jinabom/uscis_form_i-_912.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/84137326136.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/autoscout24._ch_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/lemageteleziwagisezowidin.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/22243367103.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/payback_3_game.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/resistant_hypertension_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/farberware_air_fryer_oven_recipe_book.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/7968680524.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/binder_spine_template_publisher.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/free_vpn_for_mac_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/informe_de_auditoria_administrativa_de_una_empresa.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/vampire_the_masquerade_ghoul_character_sheet.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_off0000d265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD265 5648 bytes
SHA-256: 70b87cda4e37786adf5811bd284833fd789b69bb9bd47683d39bf7f3b31ef3ff
font_01_sfnt_off0000e589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE589 10088 bytes
SHA-256: f35397a82709b145b25bcca64c5aa5f46555f2143eccbf3d19e09aab58055a56

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