Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ae2dc4039ca4d8…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 20:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 537fe8dc67990162942fc48aab85634b SHA-1: fa920e7eb31418ef7956e6e991208fed3015978b SHA-256: 25ae2dc4039ca4d8aadf78466f0aff4cb84ae23719f8d1bfcc0d1d804445a5b1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query for a specific PDF document, likely intended to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of external URIs and the overall classification suggest a phishing or malware distribution attempt.

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://nipisod.ru/wix?keyword=waterfall+lauren+kate+pdf+download
    • https://cdn.sqhk.co/duzoxibuf/MiaEUge/how_to_get_all_skins_among_us_pc.pdf
    • http://help-service-support.com/88186283918cvhh.pdf
    • https://cdn.sqhk.co/rutesawir/jijitKC/starlight_cinema_city_theatres_anaheim.pdf
    • https://cdn.sqhk.co/golemejexeno/5nYoThc/moremiduvurulupesoxaxej.pdf
    • http://rigipufefe.iblogger.org/karrimor_running_top_size_guide.pdf
    • http://vakekaninu.iblogger.org/phenolic_resin_msds_sheet.pdf
    • http://mbfsopg.com/math_reflection_sentence_startershbk8y.pdf
    • http://xanuxitawunavi.iblogger.org/boss_engira_baskaran_songs_free_starmusiq.pdf
    • http://zelopaqq.xyz/supokuruxebinokamarso9kd.pdf
    • http://alifan.store/wegelowiwonoxisulozakana2vazc.pdf
    • http://toolsbestpricemicrometer.site/76723285722yei18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jizabimumonox.rf.gd/free_rental_lease_agreement_forms_printable.pdf
    • http://zasufogokalo.rf.gd/fix_you_piano_sheet_music_easy.pdf
    • https://s3.amazonaws.com/gopuze/58379094968.pdf
    • https://s3.amazonaws.com/vexeliku/44051157441.pdf
    • https://s3.amazonaws.com/fibesezati/advertisement_template_maker.pdf
    • https://uploads.strikinglycdn.com/files/00d0fe8e-ee19-4e14-9e7f-d0338443a6c4/functional_strength_exercises_for_older_adults.pdf
    • https://s3.amazonaws.com/fedure/fimotukuxube.pdf
    • https://s3.amazonaws.com/rawesaragegugar/mokajizede.pdf
    • https://uploads.strikinglycdn.com/files/436351b2-7897-4acb-ac4f-0c603995cf3c/feroserimupidodogolejavo.pdf
    • https://s3.amazonaws.com/wibadinavosunom/blender_2._8_free.pdf
    • https://s3.amazonaws.com/kewuxejikiwe/tax_deducted_source_questions_and_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d81.bin
261c0989fd0d339a50c8f4dae9c0630c1913f6504688cb1e61c49312eb428e50
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 5028 bytes
font_01_sfnt_off00011ec7.bin
43b61955fcf8e27060b963f746eddc728a35d63c97d5873b96cd573bed2cd809
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC7 10600 bytes