Malicious PDF — malware analysis report

Static analysis result for SHA-256 6254938a6266d113…

MALICIOUS

PDF

81.0 KB Created: 2021-09-08 12:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: afe76f34faaa350f1924d4f1cb7d38a7 SHA-1: 9da185dedd2a8a054afbc733423599241fb54d24 SHA-256: 6254938a6266d113519133d11400378789cf44b9f428d2ed684bbf7cb0967805
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://remini.hu/userfiles/file/ridukaxawijojenovimig.pdf In PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161340ed52c676---13111093029.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c5727c129---56963861509.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/9a5b33d673bd9a25b869903a3140931a/7397735390.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/vorojikaxuwewinagawe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318c269d661---lumiguvazewem.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/5802701994.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/rekuvinunirabizi.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zejamejutu.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1d3c2cc33---kuxokanaboxeborakun.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/nelavakur.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/denuzimopelaf.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/65225269644.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/5067a9c5566f234ab1ab88d676228878/zuwuvuxebaxukuvitefisidar.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/34569900608.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/11253750971.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/33279780989.pdfIn PDF document text
    • http://asid.rw/userfiles/file/pufer.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/wozilujojuzekadovejufej.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210908174425121.pdfIn PDF document text
    • http://thoitranglani.com/upload/files/pugumimosodusa.pdfIn PDF document text
    • https://funke.be/data/file/79264662228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=twilight+imperium+4+learn+to+play+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83D 17320 bytes
SHA-256: ed7f7431f8e4f62a0f8a050d0073dba42161c1fbd264c0596a1a89ffa19096a5
font_01_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 11116 bytes
SHA-256: f3777355ac22598d9b34f3bd3f9b0c333b72ddf421c282e14daac92daaf467b9
font_02_sfnt_off00011ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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