Malicious PDF — malware analysis report

Static analysis result for SHA-256 0759e29d51638d01…

MALICIOUS

PDF

91.1 KB Created: 2021-07-21 11:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 17fecfe4d5c7943b31a0f52a57c115ee SHA-1: b1647305383703897fda6514caf6185774dc2497 SHA-256: 0759e29d51638d014dcc92b42a13e6a04e4763bf1200bf5ca15e238a28fadf20
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of an advance-fee scam, employing a link farm strategy to direct users to potentially malicious content. The presence of multiple URLs pointing to compromised CMS upload storage and disposable hosting, combined with the ML classifier's high confidence score and ClamAV detection, strongly suggests malicious intent. While no scripts were directly extracted, the document's structure and embedded links are designed to deceive users into visiting external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/303sps3bhtbu0jev61bkocegqm/wutani.pdf In PDF document text
    • http://gps-tw.com/CKEdit/upload/files/zexafexobigawozeg.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/jujata.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992f1c337e7---gitazaruseli.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/dc46e849a4a714750c0ca4efbd616092/vodogokofigaverorikiniz.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/71255320564.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/1apa97evctlqk839ps3ulffuc6/72794853233.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/47250743001.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/7r8f0ph1qcg53n47hukdtne7j5/79100436231.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7d57c2826---feziwudutesasemuli.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9dd246e871---58919921142.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c52c29b7d---xabaw.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/84814671817.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843d7b36439---6947375985.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9164658ddb---punitokiledadereka.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/74kfi851h3c14o81k105e7eh8l/59007431725.pdfIn PDF document text
    • http://fitviewer.biz/files/file/62156282778.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfea192090---lupiwojosolalilani.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b253c29b578---patatatofizuxopuruja.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/b31f0e6789ca9729defaae291be1a13a/88928770724.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/2c7dtgf3at1k6bnnhqieeonjkd/lazebawojuvoga.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de3c666b1be---lorefewike.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/lthkt390ma2bkus49eevocl2c7/juwotulejorom.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/83773031533.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/sulekojojenilasejobe.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/rowez.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/tokomawofopaxuzoxov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=private+equity+recruitingPDF 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_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 17668 bytes
SHA-256: 10d4240f36798ae1dcdbdbf153d9594fa3b279485d38fe8cd359b174b495fe32
font_01_sfnt_off00012db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CC 10496 bytes
SHA-256: 600789db3a2928f5a7d5f25569f1860d1dd39800ac245b5b3f0182fdcb11045c

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