Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74e649322aa581c…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 12:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1c6ee84b8a50867572ce57c876f99302 SHA-1: f9ea4efcfcffd9b68c469d81cb01336163f14215 SHA-256: f74e649322aa581c15e15f8a0c72b5d635d1eef9baeedb5debe568d0b9123cb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, with ClamAV also detecting it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting an attempt to redirect users to malicious content. The PDF structure and link farm characteristics indicate a likely phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078cd0d76061---nenatakuxibokavebol.pdf In PDF document text
    • http://cesurmakina.com/userfiles/file/rimosawakadonimap.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/bapaxugetagewakowi.pdfIn PDF document text
    • http://intertravel.hu/_user/file/sajamodup.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fa57a1886---kanesomajerezizinidijote.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087abf5d876b---86604897391.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa2793b08f---96143916249.pdfIn PDF document text
    • http://spakimthi.com/upload/files/vovasanululokawerivabepax.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/83259581978.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/badoz.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/24931884163.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160792f68033b6---11123341221.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a009ec1b86f---14931003950.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jutugasev.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/gawavebadibisud.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1bd221216d8cc74438766f0ffa1556e4/weneborelavunetudu.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf44bdecf62---tipoko.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210523162176333681.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/28532681136.pdfIn PDF document text
    • https://menu2uplus.com/images/file/xuwujagalomovuvexa.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/v3du7qcsk771dkiev38maa3uu2/diwabalafebifazudunu.pdfIn PDF document text
    • http://tfforming.ru/d/files/121200262.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/df9bf79a1082de5619096bb7cd17580d/20488326984.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/bidegubixarixaxameb.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ekodcff5m0vm48mtf41dl1g01s/dalojuxidomijupexasovet.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66831cf145---86100784358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=interpretacion+de+la+norma+iso+14001+version+2015+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/kamirezapemax.pdfIn PDF document text
    • 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_off0000e09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 18508 bytes
SHA-256: dc98325c13aa2babdbb4db6adbca620687c5e2881b9b178a22a6dd8a4497ccad
font_01_sfnt_off0001108c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 11304 bytes
SHA-256: b72b4bfc91588949c425f3f3ae7b44841c65741aa601eb493c3ab185d145cab8

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