Malicious PDF — malware analysis report

Static analysis result for SHA-256 07aabf055e4349f5…

MALICIOUS

PDF

92.7 KB Created: 2021-08-10 22:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8c6ac5d70d4b77515c2e5bb17524a8be SHA-1: 907dd44f93c793f4e72006fe94774f1e13732cd6 SHA-256: 07aabf055e4349f5ae08d8020ad02b80e4dda0014dd3c0f46f94893fb375fdc1
164 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a visual download button further supports a social engineering lure to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/1c8f12e9a8e441b2d75cc8fde331f959/28662675260.pdf In PDF document text
    • http://greatnice.club/updatefiles/file/kufaworubuzin.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/tadepam.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rv99gjsb41rpl0gb0e3jmd8d67/45139547239.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/oqkesk7g9c3o2pup8e3b9p14i4/91613891799.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/86311564033.pdfIn PDF document text
    • http://goreskyreunion.com/clients/b/ba/ba087d28c24afe6c5bc45fa062332e47/File/95247269742.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f44c614a0---53847053296.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/sotaxebulowazuvanogaxo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8a361df8f---saferodiwad.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a087c1fbf8---kejinalikurim.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/d9cfa25a5629eb2236f0ad5b0606043d/63809375362.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160adf14b9c7d0---rofusoxirez.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/jofekinodul.pdfIn PDF document text
    • http://formel1vermietung.de/userfiles/file/52446740546.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/jujajorotedufuf.pdfIn PDF document text
    • http://sartor.ru/upload/files/kulasixakupomiveparo.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/jimaxudu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/54852605715.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/zevej.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a29dc81400---jedasuna.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/nalelefeg.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/77533465527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=gb+whatsapp+new+version+2019+augustPDF 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_off000103fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C12 11380 bytes
SHA-256: b3a4c728ab9b5e703b5303015345f00859f5aece7c40c5481c07bfccab0200ba
font_02_sfnt_off000136c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C7 17472 bytes
SHA-256: 1db7489419417386ea7055d4daaa92d9be91c49a3fb1aa015640f425aab3124f

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