Malicious PDF — malware analysis report

Static analysis result for SHA-256 45166463975db43c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-24 23:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d547c1ac0956b4ae71a44c80312bcd53 SHA-1: 0febc801e5209743d392abeea8c7116dc9056bd1 SHA-256: 45166463975db43cfd2958b6f3b597665235782b007798fbc1c1151c2953ad2c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to '3ds max tutorials', aiming to trick users into downloading further malicious content.

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://kuzutuzo.ru/award?keyword=3ds+max+tutorials+for+beginners+architecture+pdf PDF link annotation
    • http://sakekoduside.iblogger.org/remington_1100_trigger_assembly_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/mhcichh/56964426382.pdfIn PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/4de5f16.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/Xqmgghh/ghosts_of_mars_trailer_german.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383699/normal_5fcf5bbac1065.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/3bx4RpS/84700968134.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/counselling_adolescent_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450350/normal_6052a54034533.pdfIn PDF document text
    • https://losirasi.weebly.com/uploads/1/3/0/7/130738883/5805093.pdfIn PDF document text
    • http://dexuposi.sportsontheweb.net/98421288937.pdfIn PDF document text
    • https://galesarenad.weebly.com/uploads/1/3/4/3/134380117/98914.pdfIn PDF document text
    • http://pupoxiweluzuvem.22web.org/vawejavenekubowutirivare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470833/normal_6009e3edc54e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najijojovigom.myartsonline.com/laporan_pendahuluan_angina_pektoris_tidak_stabil.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/kesokofu.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/google_maps_street_view_app.pdfIn PDF document text
    • http://lulikeleweworup.epizy.com/inborn_metabolic_disorders.pdfIn PDF document text
    • http://nokonasaxe.epizy.com/sazodozelom.pdfIn PDF document text
    • http://lezenexujurab.epizy.com/bokalejididonamozijuraj.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/reasons_for_carrying_out_research.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/amnesia_retrograde_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/samsung_galaxy_note_20_ultra_specifications_in_india.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_off0000f497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF497 5844 bytes
SHA-256: d501581cac7ca15b82f28b1fbe0bb5e9b68f2007262e17658109da1e3b875734
font_01_sfnt_off0001084f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084F 2236 bytes
SHA-256: a5cb4918489952136b44c1aa6dd11d6d1859577cf30f416ccad1b66782247f89
font_02_sfnt_off00011269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 10468 bytes
SHA-256: 99fa9825c498e315e3355afe9efd39e6e685af7c5b158945e854052195642de5

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