Malicious PDF — malware analysis report

Static analysis result for SHA-256 fded37be2ccd966d…

MALICIOUS

PDF

74.6 KB Created: 2021-09-11 19:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d3d3ca499924cfb7a1b8bc11f702562c SHA-1: 601d3b08f3c6aeaf0de17a67b121890d8d9440cd SHA-256: fded37be2ccd966d7a096a8c963007279aab6de2dbb28dd679253a662a25fcde
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a callback phishing or tech-support scam. It contains numerous links to potentially compromised or disposable hosting sites, suggesting an attempt to redirect users to malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://cwesp.biz/upload/file/melat.pdf In PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c930588fdd---6235207374.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/21992919055.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/wojenib.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/85692120073.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/jejodap.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202109031044486156.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/26295146276.pdfIn PDF document text
    • http://kaies.net/upfiles/file/59083333262.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/zeromiviwupozaket.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136de7ac1705---58638172234.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/kikiweferulodabejepilete.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/38cbcdbc907b7c23cb647bbd6195f7ec/63831183110.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/88733795706.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/6afa91aff63496954594aa901af4d022/98501409147.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/22904673224.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137553adccb9---kezegasowuredadikuwet.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/borokepuxegenomewule.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/fetodaje.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/ledegafakakekij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=angry+birds+programmingPDF 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_off0000c0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 10692 bytes
SHA-256: 29e8120f901dcc78beadc2b91c0e214cd3a9fba368b40022e08380f3fb8029ae
font_02_sfnt_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 17312 bytes
SHA-256: f80d88230e6225cb135fb8c63e9a235833116b1d20543049dd2b8d7198d1ee09

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