Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e407b5c8539fa6…

MALICIOUS

PDF

95.1 KB Created: 2021-06-26 03:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4ad6a54c22100a7fa12013f1b60bd94c SHA-1: 350e8cb66a9b23edcce35797b5ad9b7427375df9 SHA-256: 03e407b5c8539fa6d0aece3ac65c3d49e6e33015b185e76deccf07c4f237155c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to defraud the user through a fake lottery or prize scheme. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/15bc935f5273bbe4c2307ea7823e95af/lanod.pdf In PDF document text
    • http://mooneyes.pl/userfiles/file/5397962845.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/72097611273.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/73279006003.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9189c920---fadamatow.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/3049519727.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609684d82c8b9---todaroxulonufesipegek.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/8df2bb42ff70504af05df1ab565b14f7/77035876909.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7df312524---36472039662.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce5ac0ad98---vajozinubowutop.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/f97958f87da5b2c255235304f5c91189/nalovap.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/aor70l88ulcrv9ksj9unp30mq8/36872126913.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/risotokodanikarilexokobe.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/7032385852.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/fovitekiguras.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ca170792e8de258d18c70accf813d37e/49805254990.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cc0d061ee---11886217425.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e449765b8---24855988240.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ejno3fbh87nseghgmv1rjkl961/jinokejavobuniw.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/tagikoledigureve.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ctkjjq6nqltn6l99bbrlgrkcnb/77717967907.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d015c4a5f098324559f387db64d5987a/20494176727.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b968d35e8c6---63636623555.pdfIn PDF document text
    • http://allycatering.com/userfiles/80961916018.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/sofevisumobapigad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=if+i+was+17+what+year+was+i+bornPDF 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_off00010db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CC 10660 bytes
SHA-256: 24cc08013369ca4288b9ed939458326bb1c7e333f2f6933710a05c4252926857
font_02_sfnt_off00013e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E55 18012 bytes
SHA-256: 90a47b8fae6429312a55200bcadd705536d14839029be675365b881dbcba20a3

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