Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51789834abf6605…

MALICIOUS

PDF

69.4 KB Created: 2020-12-21 22:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 95e85e5994acf7555d33618245772dda SHA-1: 8357b1accef976f05c1a428422153aeca27660d3 SHA-256: b51789834abf66057dbf7232876ac39b659c8b8f30fad1251817bd8d9f99fcdb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to reference the lure of '1080p dragon wallpaper for pc'.

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://traffine.ru/strik?utm_term=1080p+dragon+wallpaper+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f8b9d2beebf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421341/normal_5fc613a6ac7dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5fc5fbadeb561.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/tipikaxe/einthusan_app_in_roku.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/aia_insurance_claim_form_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/brother_xl_5130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c368325-d5fc-4b14-8b45-e04f040ff2bf/crate_gx_15_amp.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/platform_sneakers_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/vapevevasukimifelugi.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/mass_effect_remnant_decryption_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/icj_advisory_opinion_kosovo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf268951089318d83ee97c/t/5fdfc9d91c66f52f5fa98d9d/1608501723708/tuwugemisasoditu.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/86008475778.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/gizolezunexivazifuvepu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf111089e267495dea1fd5/t/5fd67049ab1a676c72905ab6/1607888970926/international_student_travel_insurance_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/benelli_125_2c_manual.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC73 5528 bytes
SHA-256: ffdf7b6e824826736535dbb2035d4fd4002f3cb841a1150f4df469480dd6a254
font_01_sfnt_off0000cf6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6C 10532 bytes
SHA-256: 5a909ea122fe819cd370cd0025ac4c7c10ede010396a38b4d6b21e9d85e2d9c1
font_02_sfnt_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 16164 bytes
SHA-256: 3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58

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