Malicious PDF — malware analysis report

Static analysis result for SHA-256 34635ba9c5580e92…

MALICIOUS

PDF

85.5 KB Created: 2021-07-26 16:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f812f3e4fae6aeac6b0b3a6a346e67b7 SHA-1: 1b2e1ca58234d8a6cbab88e2711c6198eed9b9ad SHA-256: 34635ba9c5580e92eb997030296126203954061a239d98c875b07d7059dff02e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or contains malicious content. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The presence of external URIs and the overall structure point towards a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://briljant-maleri.se/UserFiles/files/gafakojomexotigir.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/db0e40f3d3fae33667300fe7de06fe57/nilep.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/23409692576.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/62280771971.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16229015752293.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/86904684700.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/lapupafegop.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/mmhv94bft8arp1f5e95oc9pri7/97149765088.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac61fc27af---zizudapadudukatoka.pdfIn PDF document text
    • http://www.bash.cl/media/file/riwujuridavome.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3mnldgk9tcineqn45mago5j293/mijijuvepazaf.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/nanigazutinopu.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/jawulafuzudokejakunutiba.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/falijisede.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6da4459be---41436731714.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b97c0e78e1e---19894402235.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a57665ce5f---lukefedu.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/3218665022.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/xusamebapegoxudenivogepi.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/44449366031.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/79b98af53accfde57176ae41042f6c93/5516655425.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3552107262---27422804526.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/84567523558.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/9d6d055b109f72879380aa28c0d18aa4/nisijero.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870ca98c4e5---81255880775.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=valores+comerciales+de+los+capacitores+electroliticosPDF 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_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 17148 bytes
SHA-256: ba54ed92baa91610ec164685e7f12359800f1bbf5478b1c36dd8236a25c48d00
font_01_sfnt_off00011728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3F 10540 bytes
SHA-256: 9f3d6d23e8b23072ef7c8881935b7d35c2198999a84b167321dfdb67e4d5db2f

Open this report in the interactive analyzer, or submit your own file for analysis.