Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f48e8bd4d324b8…

MALICIOUS

PDF

75.0 KB Created: 2021-03-21 09:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66f90e09b7c771239b0fa53ba89b1634 SHA-1: 55e7078518a0bbce152d7d0556b7c61b36e6121c SHA-256: b9f48e8bd4d324b8cedeb5bf373ff393405d1d2cb9340515221b7592a8047264
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to external websites, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to game achievements, directing users to a suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=throne+of+the+four+winds+achievements
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/kotavuke.pdf
    • https://luwegojozokozop.weebly.com/uploads/1/3/0/9/130969796/9a5266.pdf
    • http://tozofuji.scienceontheweb.net/sunotobadijowewuborode.pdf
    • http://lazujifoxupa.getenjoyment.net/rain_dial_rd-600_replacement_parts.pdf
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/d2076e84d72.pdf
    • https://tufobedix.weebly.com/uploads/1/3/4/4/134431979/tubapatinilekowizapi.pdf
    • http://larokamexi.sportsontheweb.net/aines_en_el_embarazo.pdf
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/9902264.pdf
    • http://zosuwalerikare.getenjoyment.net/place_value_jeopardy_game_5th_grade.pdf
    • http://jafoxidulez.mypressonline.com/the_last_lecture_randy_pausch_video.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nitajosasa/22753077999.pdf
    • http://wegudewabeko.rf.gd/dna_ka_full_form_bataiye.pdf
    • http://madukavinoxonal.epizy.com/devenir_famille_d_accueil_chien_guide.pdf
    • http://fugakemitabub.epizy.com/duwamezidariponun.pdf
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_bf4b5f0c072845cb9a8b6791c5757698.pdf?index=true
    • https://s3.amazonaws.com/tadevewuju/zuzaponeborobaj.pdf
    • http://pujumek.myartsonline.com/is_breath_of_snow_and_ashes.pdf
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_76d23581f3d146f0a046083b3967ea67.pdf?index=true
    • https://s3.amazonaws.com/lupebesu/buckram_hat_forms_victorian.pdf
    • https://s3.amazonaws.com/daniwodug/aguner_parashmoni_song.pdf
    • https://s3.amazonaws.com/biwubeleba/86632496613.pdf
    • http://mewabetowa.myartsonline.com/fistula_perianal_clasificacion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae4.bin
acef33c721cc10e28dbd78de2bdd69d0a2fb4b58008241c02d36bda601c93065		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 5212 bytes
font_01_sfnt_off0000ec83.bin
6ee207fc72b83ba0274f23295fe165a32c50febec182bcab39a51c5e85185f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10588 bytes
font_02_sfnt_off000110a2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A2 4324 bytes

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