Malicious PDF — malware analysis report

Static analysis result for SHA-256 9729017b5fcaef7f…

MALICIOUS

PDF

80.8 KB Created: 2021-09-13 13:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 78ae9bef90486c9a370b806504c9d5ba SHA-1: 164cc00ef9910cc25dbf26f618a931eb3167a24b SHA-256: 9729017b5fcaef7f9e35fc4f14558042686a0ee75111c9e50967e64fd6d063f7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical alert for a 'Recovery secret / private key request'. This indicates the document's primary purpose is to trick users into divulging sensitive information. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mannoorpally.com/uploads/file/68699306035.pdf In PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/nidevowagizuparalez.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/gesenodupetuginolabuwa.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/49147077248.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/vuwatarefosizawomunutape.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/72553425240.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/62545466239.pdfIn PDF document text
    • http://ailizia.com/userfiles/82751702547.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/tivozi.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/jaromamupugurodedulolujo.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/8889528431.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-2/20210902134837836575.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/16560286009.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/1f69gl78hmodtmnf3ptb0bilsh/96578177770.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/90048128210.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/73420087860.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/mebaganutelopa.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/gafogaso.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b313030970---pozin.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/60138957185.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/73374477713.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/71421795785.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=photo+editor+app+apk+downloadPDF link annotation
    • 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://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_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EA 16984 bytes
SHA-256: 370da5b4453a5fb53cd9e8e4357aaaa00412058f2566f55f2b597b2c7a9dff8b
font_02_sfnt_off00011dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCB 10500 bytes
SHA-256: b9b397d0b735b4d7cb8b47bad006795df811ebc991923b52ad48fa84db987476

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