Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1dae4de9138860…

MALICIOUS

PDF

80.4 KB Created: 2021-02-21 23:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a78f845cd0567b54bd69f92a9eb42f94 SHA-1: 0716bcda832d82c62296e32e97f2a8b16c5f6dd2 SHA-256: 4e1dae4de91388605e4d71163b52ba0e9201ee1bcf4ef7a474b71a312c6b3609
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URL disguised as a weather forecast. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of an external URI and the high confidence score suggest a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=washington+dc+weather+forecast+january+20+2021 PDF link annotation
    • http://nunanokipikade.22web.org/latest_cg_dj_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407664/normal_6028200e680c7.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/ganusemuxirumedaod.pdfIn PDF document text
    • http://gakmancreatures.ru/370137228899zv68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387036/normal_5ffb68c5c1a1e.pdfIn PDF document text
    • http://begemotiks.space/samsung_j727a_root_file_download_sitv40z3.pdfIn PDF document text
    • http://winoorama.site/digital_logic_and_microprocessor_design_with_vhdl_solution_manualxw4ie.pdfIn PDF document text
    • http://wtia.space/kenmore_dehumidifier_70_pint_how_to_useconjd.pdfIn PDF document text
    • http://stroy-level.ru/platane_blattform_blattrandfruis.pdfIn PDF document text
    • http://chunyoo.com/xifuxotoxizojonf3.pdfIn PDF document text
    • http://worldthailand.fun/537926608277zwod.pdfIn PDF document text
    • http://creamwalls.space/candida_albicans_oralra9fu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5ffa6236e0aaf.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
    • https://s3.amazonaws.com/wujafivabipo/mipexokive.pdfIn PDF document text
    • http://getetir.epizy.com/98324915123.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/forixawotubakafeg.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/80529886245.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/23207194700.pdfIn PDF document text
    • http://kuwoguki.epizy.com/71551698544.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/alfresco_multiple_files.pdfIn PDF document text
    • http://tuwidapaj.epizy.com/annelids_mod_apk.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_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 5740 bytes
SHA-256: e7070e01c561379361592f5538a3149c63874bad69686487ab5e4421fa347196
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 11584 bytes
SHA-256: a56e70bab5a01bc44ed67f2d8db9e3445618d12f200ca69987d5a9d8ebde93a1
font_02_sfnt_off00012588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12588 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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