Malicious PDF — malware analysis report

Static analysis result for SHA-256 598fd16572b08baa…

MALICIOUS

PDF

79.8 KB Created: 2021-04-19 20:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3821bb635c53fbaabd04b40ac627f1b8 SHA-1: 4fc3f0e42f01658b4c3390c189a72125e97930be SHA-256: 598fd16572b08baa24d3a6eb85fb95a6ef3260ed1cb8a2eb337e82df6d53dd95
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=what+is+shepherd+mean+in+the+bible PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5fef4dd21d21b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_605c00c761c39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486354/normal_5ff9beb69faf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_603f0e85dcc94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_605b6fa36eb76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_606a8e8e4ed89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453333/normal_603422b461fe5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5ffb9ec578973.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fcb9453497e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_a7177aba58604886bba1778338b22e41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/hiking_merit_badge_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/samsung_galaxy_s9_case_with_credit_card_holder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87500231-bd9a-456f-9309-2717094df8a2/85447099258.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_6a1f82f4eded446cb943adb568978f0e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satudifin/fuwozegakale.pdfIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_509d9c881e7c4033a16fe7a6083fc5f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/tamil_monthly_calendar_2016.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_97300e5deffa4948a72640f784998c96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63060ab-51de-422d-a94f-52f986734fba/98943121390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879e3d0d-2189-4a83-95c8-4b453115054a/will_there_be_a_season_3_of_13_reasons_why.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc4b158a-e991-4035-bbae-3511edd64447/sony_fs5_manual_deutsch.pdfIn PDF document text
    • https://1e6856c5-1481-42a3-8d1a-2a2567f9fa5a.filesusr.com/ugd/a8b033_81a875e6b57c46689efb755a6c8f7b50.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_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 5352 bytes
SHA-256: 3b8249bc0446d26163c260654c2024ff1b1f0995eb9379ef0dfbf14ab21983c7
font_01_sfnt_off00010bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BED 10712 bytes
SHA-256: 69f57cbfb4f920047d5e24929d33f74ca346b4cad8f9304b8911b70a09255eda

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