Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e489c4adfeffad…

MALICIOUS

PDF

87.8 KB Created: 2021-07-08 01:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7b7a8921404f64033b81bb2a48a23b4b SHA-1: 88e68fed6f6c0604c7c46437155752f94dfcee13 SHA-256: 06e489c4adfeffaddd844ef1eea62abb3134b83d8dda6a5aeb43ee29e5fbc685
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and heuristics strongly indicate this PDF is malicious, specifically employing an advance-fee scam lure. The document contains numerous links to potentially compromised WordPress upload directories, suggesting a mechanism for hosting malicious content. While no scripts were directly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608586e377733---75702543962.pdf In PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bef24a6f3---pupapasidulogofiko.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/kujaxanupajoza.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/2d3smnhagublnhkqs3ec28j21o/97198417545.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/40d34f56002f330fd99c04857cf10a86/31255347459.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/salijejijatokizani.pdfIn PDF document text
    • http://lueckerreunion2020.com/clients/e/eb/eba09433058400eda594a485f9004317/File/bozixevezese.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/noputuzesofopibekeze.pdfIn PDF document text
    • http://centurionim.com/userfile/batiment/file/gunesomonewuros.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07002af87---jetobinixapizakat.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/e172693e27f2c03d091e2e00cff29337/4088202433.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b72b5a087e5---mozomuruxob.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/0b235c2bad7502257342c6663b859447/61865487124.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c14c75dc06d---75224102692.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdfb2c6895---72378864592.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ad7bccbacd5811f4d645547304082625/80506171962.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c547158efe8---79921129010.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/2259earkqronvif90tnt6lhsd6/41371404662.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210620031940.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c69bbbe0a4e---reximonomunatevejuvorav.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/24919736010.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/7f411c00eb3010b5503cfeed2ee332d9/17298957275.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9c4213e2a---sofutevo.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/faxaluxuxogew.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/516cfe3fe74c82fe79efa231e1d05f9e/winazaforuwegewosezubes.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baaf9ce9439---12726845359.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=blood+donation+bruisePDF 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_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 17180 bytes
SHA-256: 5a0cc850f7b6834dde3a3188095cf0c92887c089a3a3205af08f24faa79395b1
font_01_sfnt_off000121e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F7 10532 bytes
SHA-256: 99b3fa16cc85923f7a2a33c528cb876a1dfc24971f4e6c7093368cec8af2ffbe

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