Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dc7976f312a6d9…

MALICIOUS

PDF

87.0 KB Created: 2021-06-26 19:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c34adc870371325fcca0d2e7935eb19 SHA-1: 324ffad76f3ca6b655afeaf55a323adedc78112d SHA-256: 76dc7976f312a6d9f5f1b9170a3082643b2fe567a6e2e033c0b5f76235bed56c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains heuristics indicating it is part of an advance-fee scam, specifically mentioning lottery winnings or parcel delivery requirements. It also includes numerous links, some pointing to compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://exima.kr/userData/board/file/renikuso.pdf
    • http://mega.kz/media/upload/files/fogejudokurerop.pdf
    • http://airlineclassof66reunion.com/clients/c/cb/cb51827d251551eca15067b3b23580a4/File/wonegojojijopik.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/1eimi75lfsgihrbjlm6rcunokm/10299721216.pdf
    • http://tktravel.shop/FileData/ckfinder/files/20210608_F8E0DF507762F85A.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/6ai2sm7u75emudp37274linao2/73339378949.pdf
    • http://nguoigiupviec99.com/webroot/img/files/rigevotorudereweraxa.pdf
    • http://lev-steklo.ru/userfiles/file/31521916200.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ac14f2534---zoxawuzezewogup.pdf
    • http://accessiblevehicleservices.com/userfiles/file/30111075801.pdf
    • http://moda-minulosti.cz/docs/momin/file/92631112332.pdf
    • https://avela.md/userfiles/file/82805011228.pdf
    • https://abugfreemind.com/userfiles/file/rusirasadegani.pdf
    • https://penzionradvanice.cz/res/file/8992509048.pdf
    • http://sintellect.ru/Repository/file/sudimiwuxidejatune.pdf
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/zonojizexovokevixopofuxam.pdf
    • https://mfdesign.hu/files/file/23358757121.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e0f263a3e---44951653351.pdf
    • http://bosch-service-center.ru/uploads/files/8825333344.pdf
    • http://clairvoyantinfotech.com/demo/images/tigugevutasagixu.pdf
    • http://asesorgubernamental.com/images/file/katuligaxilerutenadab.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/c95862764b005eb8c50dfa068c5755ca/xoduxipopuxuzexorolanedev.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c2a44fd44ecb5930394eb4c25e8ae39c/9771879014.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/b8fdeaf11505530c67d410b78832c668/nekovodevibegoraligogutof.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607983466b96e---wapeputupapurimuvo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cardi+b+and+megan+thee+stallion+music+video
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee01.bin
0eb0dc4a04d8f7316e06bab46ff5f8f87ee1fcf9fa6333ccab7ce71db6da3af3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 17820 bytes
font_01_sfnt_off00011c91.bin
2dc847b6c63c72df24777aae7f0e81d0f418d75c59f82a13863cb18a822eee4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C91 11156 bytes
font_02_sfnt_off00013642.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13642 16792 bytes