Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf75f354099ba3c…

MALICIOUS

PDF

77.6 KB Created: 2021-02-28 22:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d5e91d56114893731ef2c4838cf823d SHA-1: bbe4df5ef44a26d7386cc05f65e526ebd6fa4309 SHA-256: caf75f354099ba3c511aae9e7931a8e94338fceae663445d4f323d3369c3337e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'bologen.ru' suggests a phishing or credential harvesting attempt, disguised as a weight loss app. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely intended to lead the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wb?keyword=weight%20loss%20chart%20app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456699/normal_6021c50c01db6.pdfIn PDF document text
    • http://respect-ltd.su/busuwijasuguwefubaw7241.pdfIn PDF document text
    • https://gonalibage.weebly.com/uploads/1/3/4/6/134652093/lititumovewimelasugo.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/PjhiayY/23185535064.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/7xjachb/strategy_definition_in_management.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/graco_solano_crib_manual.pdfIn PDF document text
    • https://lobodilogiji.weebly.com/uploads/1/3/1/3/131382226/kojuxokawapewikapi.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/present_simple_vs_present_continuous_elementary_worksheet.pdfIn PDF document text
    • http://idealica-official.website/latowaluwiveferasemevofoxjp8j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474739/normal_5fd3ce35d92a8.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/1d111585a5a.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/galinikagopit/bobol_wifi_wpa2_dengan_android_tanpa_root.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/ginamalemodotowugulewa.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/brute_force_attack_book.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/babyface_savage_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/madusa.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/tfs_branch_merge_strategy.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/72244303871.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_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 2960 bytes
SHA-256: a31aedb3fe800cd2b5c0120397ec9570e12c7cc97febb81e3d6171160c50e6bc
font_01_sfnt_off0000f186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF186 5208 bytes
SHA-256: be0b0f223b34b1cce67af52302faa0b4f2f1f48efa64b0127664617eef6cacec
font_02_sfnt_off0001034f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034F 11108 bytes
SHA-256: dab97b17b03c8eb724fd0ef066f421f416374e4b705f500206636563c182fa89

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