Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefadf30346c597e…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 22:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9ce28f19799fce09ef1296dd8d4125ad SHA-1: 9f4c0089551970fd068d1daf7ec78e4de5b7fb58 SHA-256: fefadf30346c597e472b47936210b494bea4ebd6d3d49c1712507d3094a84de8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm intended to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607794b0a104d---18649192665.pdf In PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b2cae45f1---tevuk.pdfIn PDF document text
    • https://ikincielinmak.com/upload/ckfinder/files/61685934090.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/161041aadd8b01---wekanimerenukagupo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2de5a0483---jusubabov.pdfIn PDF document text
    • http://poultech.net/d/files/8315992397.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/losuk.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/49129deb28b77eda7e7275f818e6206e/dokamaveka.pdfIn PDF document text
    • http://ymmicro.com/files/files/didilu.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/jh0n5ndk9abpvguervhul618n9/sapadasovo.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608154fe892ef---lelobixobolujus.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/jubenuf.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/47873974441.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/37953870250.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/juxavofapetekorowux.pdfIn PDF document text
    • http://vina2002.com/uploads/files/rupugiresuxekozedu.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/48436673265.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ae14cb079---wopopada.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf63065ab67---34632452946.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/80300313856.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ab9331afe---zenubefivubewekefemij.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/22494742275.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=writing+decimals+in+words+worksheet+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 17668 bytes
SHA-256: db6581a2a75e3f197271b4e86df9553b27c56c9480b5d4129f2028b853a730cc
font_01_sfnt_off00010d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B0 11236 bytes
SHA-256: b83945f0dffd79c3951f1a5f13ea013262452d7d8ab815082ba2f55f9eb35fc5

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