Malicious PDF — malware analysis report

Static analysis result for SHA-256 3798f46d53c955d9…

MALICIOUS

PDF

97.7 KB Created: 2021-07-03 14:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03027c8bcd86450f7df054acf16116e9 SHA-1: df6824a998920e72a7287c658039f5d0f9217c43 SHA-256: 3798f46d53c955d9e4d4abc7b056b8cc43b9afcc2b1eadfb26ff6b68967b150f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of embedded URLs, such as 'https://crysiq.ru/uplcv?utm_term=book+ghostwriting+services', suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://crysiq.ru/uplcv?utm_term=book+ghostwriting+services
    • https://feng-shuiworld.com/userfiles/file/vakilubipajakuzubitilikul.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0e18b811bbc28ca0c4664fcbd77a4351/taxabakatejezibera.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11c66ee9bb---45483059431.pdf
    • https://bursakaynak.com/userfiles/file/59480183917.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/74173574079.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b8c14b861---80837292088.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a7496c829cc9e6f768d3f0ddb479b63e/girarenoxenuwun.pdf
    • http://cosmik-kino.ru/sadm_files/joguwurunajop.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c9cff162c---27469335836.pdf
    • http://fly.no1-yes.com/userfiles/file/kigurel.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1d0a63b25---5000159983.pdf
    • http://traiteur-ribot.fr/userfiles/file/93538581037.pdf
    • http://www.allatpatikapecs.hu/images/file/dajaponedafanuvigav.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/adcb727a941001feecca02bd062bddb9/kojuxepoke.pdf
    • http://afgventuregroup.com/cfiles/file/fedikorazuwazegelilet.pdf
    • http://bearings-home.com/userfiles/file/9625418690.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/52374408351.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/329933ba825c3517d2fc7a679c108add/81077476589.pdf
    • http://budoprojekt.eu/obrazy/file/xuwemonejelokelage.pdf
    • http://jncs.kr/page_data/file/20210615171952.pdf
    • http://aaaexpressac.com/userfiles/file/11926377632.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b3.bin
432bc3a7d45fe1372eaa2189f9d0824521202fde970edf313b996510496d8c35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B3 20416 bytes
font_01_sfnt_off000128d2.bin
499acb273d20a4bbe623f5a8739daa5298ef8b807c37e4132bbbf061a2839dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128D2 18868 bytes
font_02_sfnt_off00014790.bin
551093be33b6dff5e69187b32e276b5ca330f1caa367ec967663205d11e32b48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14790 10600 bytes
font_03_sfnt_off00015fe0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE0 16792 bytes

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