Malicious PDF — malware analysis report

Static analysis result for SHA-256 520a712405dcef6e…

MALICIOUS

PDF

80.7 KB Created: 2021-03-24 16:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5810d085c330ec8b35bba64de06b07a7 SHA-1: ba7542ea66b19e8375e5a0f3cdcf7060197ca43e SHA-256: 520a712405dcef6e9d28e061b7b0f815aedf253cd87170eb01c99842b5648919
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that is disguised as a cost calculator template. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of embedded URLs suggests an attempt to redirect the user to a malicious resource, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=cost+calculator+excel+template PDF link annotation
    • http://pojezer.iblogger.org/77944368737.pdfIn PDF document text
    • http://bestgirl69.com/english_verb_forms_list_with_urdu_meaningwu9pl.pdfIn PDF document text
    • http://mmmuuuue.space/lightroom_6_keyboard_shortcutstyavd.pdfIn PDF document text
    • http://xeresorejal.iblogger.org/odia_song_2019_human_sagar.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/blockchain_programming_course.pdfIn PDF document text
    • http://bejuzoz.iblogger.org/bang_bang_movie_songs_hd_1080p.pdfIn PDF document text
    • http://songkfrk.site/fafiforiwuvufuteguouxco.pdfIn PDF document text
    • http://timecodes.net/subway_breakfast_menu_singapore_price9f9kd.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/39499165353.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://vibexezesi.epizy.com/62716238728.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/online_teacher_transfer_application_form_odisha.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/senajo.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/avaya_1408_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/are_rca_tablets_good_quality.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/flambee_montalbanaise_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/67719568657.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/nazm_hikmet_zl_szleri.pdfIn PDF document text
    • http://vepisesilutez.epizy.com/asnt_level_ii_rt_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/dupuxi.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_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 4896 bytes
SHA-256: 8e2e0d070d760f040c4790f0485b26d1e0eeee810c3a57cb29779078ec9a0f90
font_01_sfnt_off000102f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F1 10652 bytes
SHA-256: 4fb3f430202fd41dcbe66860cc06484eb8cc54737c159572253bc9ea4e35f045
font_02_sfnt_off00012788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12788 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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