Malicious PDF — malware analysis report

Static analysis result for SHA-256 88dd3e40372863f8…

MALICIOUS

PDF

77.0 KB Created: 2021-04-09 21:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c9fba7fe278a19201b87430a1c62c645 SHA-1: 57c3155da921601767641cea582620710e070e0b SHA-256: 88dd3e40372863f8c0896a43882fef9c256f8da7acd6fc266bb1d498eea2b11a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search engine result, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the PDF structure itself facilitated the malicious URL delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://seumenha.ru/strik?utm_term=brandon+sanderson+books+in+order+cosmere PDF link annotation
    • http://tifeguga.22web.org/garfield_tamil_dubbed_movie_in_isaimini.pdfIn PDF document text
    • http://barivelovone.22web.org/peer_baba_status.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382187/normal_5ff3938078522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387419/normal_5fe27a176ff4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462681/normal_5fe9b5cedf845.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
    • http://luturuwuxas.epizy.com/teredejasemetini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c5973a-06fc-4333-b261-44f2ee77273d/nisom.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/3637241858.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/cdfm_module_2_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4292c54-dbb4-45bd-9599-b8a3632d0954/justin_timberlake_cant_stop_the_feeling_dancers.pdfIn PDF document text
    • http://gatutob.rf.gd/anesthesia_secrets_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ecc393-2070-4992-a725-614be74bb66b/womipiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/database_management_systems_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f356c646-0e42-4c51-983b-05ab65812877/financial_accounting_tools_for_business_decision_making_7th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/21140313400.pdfIn PDF document text
    • http://roxonolabixatox.epizy.com/nedebuxunowibulasavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c51300d-02e5-430c-9aa2-274b836bf56a/what_does_bible_say_about_marriage_in_heaven.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/bumblebee_car_transformers_costume.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/61939679384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7fb78fb-bc2d-4e1e-ba9a-ee4c8e9be053/gomenesumune.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/great_british_bake_off_2019_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/97222007135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59cf4bb-d051-4200-8ca1-78846157533a/78895524099.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/73826284528.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_off0000e115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE115 5012 bytes
SHA-256: 2a7620712956ab88fb13d4b564d2a5616cb88052bf31ee66a72be66c255bf487
font_01_sfnt_off0000f1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 11824 bytes
SHA-256: 3198a3b1502027bc1043175ed3f9385618e11e2938cc750af1afad2dbc645455
font_02_sfnt_off00011802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11802 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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