Malicious PDF — malware analysis report

Static analysis result for SHA-256 23244d03aa2aca65…

MALICIOUS

PDF

73.5 KB Created: 2021-02-16 08:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 778272a718922615a3cf80c13739011c SHA-1: dd803358fc8bb1540a4d51852a55bf152b5e625e SHA-256: 23244d03aa2aca6528c8c7b1d83dc385a6141be3d05d2f29e36f16b3b4390f7e
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/123?utm_term=kenmore+ultra+stitch+12+manual PDF link annotation
    • https://cdn.sqhk.co/kekelivig/fNjdhZZ/xuperuzudo.pdfIn PDF document text
    • https://cdn.sqhk.co/sivojadirabe/hj2upAV/shark_attacks_on_humans_part_1.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/ifKhbif/a_smile_is_beautiful_lyrics_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvakumo/hhefhbs/iphone_weather_app_not_showing_air_quality.pdfIn PDF document text
    • https://cdn.sqhk.co/kegetaxob/52FnEhh/91251946835.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/djjahfQ/merge_burger_food_evolution_cooking_mergers_and_acquisitions.pdfIn PDF document text
    • http://pedufan.iblogger.org/commandos_2_pena_wersja_pl_chomikuj.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/pewibim/42320663764.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/dixovef.pdfIn PDF document text
    • http://benepuru.epizy.com/jurnal_anemia_defisiensi_besi.pdfIn PDF document text
    • http://gevewodex.epizy.com/15759147210.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/pezusudovipamadadiguzo.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/discrete_mathematics_functions_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/62618201094.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/black_leather-_look_chunky_platform_heels.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/45995072012.pdfIn PDF document text
    • http://matogojetize.rf.gd/programmer_job_description_template.pdfIn PDF document text
    • http://xadaxaxug.epizy.com/xalarofozazaferitisuxanu.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_off0000e273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE273 5192 bytes
SHA-256: f70d249de91347459f4fbfe91393e08860748954b86ecd7b7e7d6c02bf2da35c
font_01_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 10964 bytes
SHA-256: e5cf89b08e850efe4b06e12e64bccd064d6fb54fe08da5a3c7e3f9c4b36c2dfc

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