Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ff06f76fc7d4b7…

MALICIOUS

PDF

113.1 KB Created: 2021-07-05 07:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 254e0d4fa32624b1294ebdc7c13530c4 SHA-1: bf83a970a25c95f9845f69edcf0fdd0c380dcc9e SHA-256: e3ff06f76fc7d4b700e66b6d904a10ebb0d21e99910984ec75b8fa18a2cdb105
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 resources, many of which are hosted on compromised websites or disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://robwalker.net/fckupload/file/60342516818.pdf In PDF document text
    • http://ahlhy.com/uploads/file/290919095679.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16099370ce2d10---gegamujuzafuva.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/sadidiguzinukes.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/54482966236.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2d5ef0d31642c79946c03218a388b16b/fisipav.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160886196ccdfa---76825123006.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607523ed4638f---pikukaz.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/wifilujogibolatarojura.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210629034435.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/roxuzumesulaxun.pdfIn PDF document text
    • http://asustainable.com/global/file/rotapasok.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dea6fd18c8---53658318510.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d280f5dd20---zidevofipariposafem.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/99463191825.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/15086073009.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/zivawilugunenetubajip.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/1gpp0n6vo7ouqmh5sj7r92t12n/munogimugosiwatavoze.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/gizekakugozivukafirewori.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/bumezivokab.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/16ff5a6799dfb81e674e04014634bcd2/39925809257.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9a7bc4716a779b0b9f651dd00d7b6609/dabidaraf.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd1844512d---newumawamoguguvekeb.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160763cc130087---kobapitizadovewufub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=oxford+handbook+of+epidemiology+for+clinicians+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_off000155db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DB 18112 bytes
SHA-256: 487f8a080123fdd1a40775b861b78f28ab900d86fdc7e39718f5cd382ee6c67e
font_01_sfnt_off0001841e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1841E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C35 11444 bytes
SHA-256: 08d7d3b77251e4f5e721ae2b367d2b222fbe39bb773e85bd9eaadbaf71c8a4f2

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