Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc844d2e7d04672b…

MALICIOUS

PDF

76.1 KB Created: 2021-05-03 05:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4ac50f5233a15367c857ae0b35c280e0 SHA-1: 5c92ebf200be0a6552ee743f6d787ac2b2c5518f SHA-256: dc844d2e7d04672bc4ba6d3dca2f7a7b3738efbb2ce217f434079112c8471585
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=what+film+does+polaroid+600+use PDF link annotation
    • https://cdn.sqhk.co/kebabefepu/iiX3jeq/snow_bros_original_game_download.pdfIn PDF document text
    • http://apparently-home.com/100140943763a5qh.pdfIn PDF document text
    • http://neyroskakalka.site/fexewafo9itom.pdfIn PDF document text
    • http://wiregabjuk.fun/bearded_dragon_names_for_malefod6a.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/jjreRI9/301694042.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/javhfii/stack_hit_ball_3d_online.pdfIn PDF document text
    • http://logvoz.ru/retroarch_emulator_download_for_pc_32_bitinsif.pdfIn PDF document text
    • http://shishkin-seed.xyz/mariage_d_amour_music_sheet5f33h.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/xirixepo/huskee_supreme_tiller_price.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/chicco_dj_baby_walker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/azure_information_protection_share_with_external_user.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b4e147-8374-4138-bed9-a6a38d404dc9/bell_radian_650_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f769e025-1fb7-4727-b8a1-94af48c9befc/ipega_controller_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ee51b88-b142-4382-81b8-a7f21066ec49/73830140834.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/job_application_letter_format_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/53389022630.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/aggiornamento_android_per_huawei.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/organizational_skills_example_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/donepezil_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/54498428121.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_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 5588 bytes
SHA-256: db5aa616dcd39e1c11158d3c809dff94a5e38a9b4cf1b3e1b7fa1835b7a04c97
font_01_sfnt_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 11188 bytes
SHA-256: 2c3701fdd77c8bd8410e88d1ab3bf0c1ac0608ad5588237a807fab7288e9e7e8

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