Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e5dda0a9f59294…

MALICIOUS

PDF

68.7 KB Created: 2021-09-09 02:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0cf3bb397b0df171013052096bf00a9c SHA-1: 0847748166deabb9648830522fc8065db0980e4e SHA-256: 07e5dda0a9f59294b0d93cf979c6cc41c0d704f817c71c5f997fdad28bd8d65f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting domains, a common technique for SEO manipulation and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oolong-dining-co.com/webroot/editor-uploads/files/83930987342.pdf In PDF document text
    • http://ovstav.cz/app/webroot/files/files/70996093490.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210904_4168AB14DBA5FD11.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210906_AD76468AC6DC460B.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/55291e9b50e114f4f09dbf6b3fadc168/sunapotixiwumovenefeko.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/6e1e68f88b5b4b8aa854a7ff8cbcfc94/vapexusota.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/47518807889.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/nogirafudaveg.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67076484444.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/magowufafavoviralobi.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/saradoninudovasuz.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///xolalubibugo.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/mojupufexin.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/523803095.pdfIn PDF document text
    • https://novitas.ro/files/mudunosiwupupovolujo.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///lumowavazixugalewutuzigep.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/sogiwizukejigiwefilo.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/58ma1ujl6ddithnkjggvbjo5mu/77536483765.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/77210559807.pdfIn PDF document text
    • http://dominoliberec.eu/images/file/files/91944920216.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/68744418125.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34283631425.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/jesamikup.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/bokabisasuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=antutu+redmi+note+10sPDF 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_off0000ae7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7D 10456 bytes
SHA-256: fcdc2289ce37449bcd10f81b2aa2195850d73f5d54efeb8577a5339ff3c48a2d
font_01_sfnt_off0000c64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 15620 bytes
SHA-256: 34cd33d20def07adc77926f583fc3d057509938cedc5fb58d347c13f3f4b0fc5

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