Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb02156c0f866e5…

MALICIOUS

PDF

79.4 KB Created: 2021-02-26 22:13:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 80aa46a849dd9f8f8e3b2e2c61aaba0d SHA-1: 9b658d849d09f91cbf6c831ab7b95dfad7aa7dda SHA-256: bcb02156c0f866e526a8a9100b8f1faeb4baf5f786044ddd1efb3328d2cea7ac
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure related to 'organic form of nitrogen' and an embedded URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple PDF-related heuristics and embedded URLs suggests an attempt to exploit PDF vulnerabilities or trick users into visiting malicious sites.

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://baarspo.ru/strik?utm_term=what+is+organic+form+of+nitrogen PDF link annotation
    • http://zanetapoxod.22web.org/cycle_country_quicksilver_48_mower_manual.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/aqualink_rs4_troubleshooting.pdfIn PDF document text
    • http://intereriia.com/guia_montenegro_4_grado_contestadan64bi.pdfIn PDF document text
    • http://arnautmebel.ru/infinitive_worksheet_answer_keyxnx62.pdfIn PDF document text
    • http://rewita.fun/fosebe8zysc.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/facebook_recover_password_without_resetting.pdfIn PDF document text
    • http://ketosimple.online/witcher_3_path_of_warriors_cave_entranceoqmb6.pdfIn PDF document text
    • http://handler-autoscout24.com/bandhan_bhojpuri_movie_dj_songhk6u6.pdfIn PDF document text
    • http://xubixaxar.22web.org/asthma_exacerbation_guidelines_canada.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/vuliwisuwig/jedupozipijizedoxenaz.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/29927500177.pdfIn PDF document text
    • http://pijopatamotawu.epizy.com/tilebelaliwuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/angiomyolipoma_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/o_socialismo_real.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/tamil_brahmi_script.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/41369063458.pdfIn PDF document text
    • http://roxigivakupumun.epizy.com/amalina_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/needle_stick_injury_management_guidelines_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/ugc_net_exam_2018_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/wanafafajaxapadurugedetek.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_off0000fb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 5276 bytes
SHA-256: 3e3fbc9112eb41d9888a1336a48109b0c2d2d5a86c309acfb435c896a32de577
font_01_sfnt_off00010ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE0 10520 bytes
SHA-256: ba940864d7782726d793186fb872551989dc5d248e2c8ee7f848e6824a9bd3e4

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