Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd439ce48a54b82c…

MALICIOUS

PDF

95.2 KB Created: 2021-09-22 20:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b7a67e92bc3cb1838af5a37e95aa00de SHA-1: fc9170db5b5e532f4e1636d2f770d34ae35dc201 SHA-256: fd439ce48a54b82c5f0a4e8e90d51e3c5f8fffccbf97c63b9d950a3a28ea486e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a link farm hosted on compromised CMS upload directories. The document contains numerous embedded URLs, many pointing to potentially malicious PDF files on various domains, suggesting an attempt to distribute further malware or conduct phishing. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/88f3322ee278c28f79f5e811fc4a109a/19510430785.pdf In PDF document text
    • http://rigassprotes.lv/uploadz/file/jaxogumuganomeser.pdfIn PDF document text
    • https://atl-50.com/files/file/jukako.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/lijorinesukuboniriri.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d545901669---dupipamorikizekasufovudom.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd4a2307d2---subovimabuk.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/19250906986.pdfIn PDF document text
    • http://nhakhoauytinhaiphong.com/upload/files/womufebunugob.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/ca69b4be537c544bb35ad9534cfcf710/rofedojamusaw.pdfIn PDF document text
    • http://leguido.net/files/62609109511.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210923_011021.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/jexuvelabosojexapesoxiz.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/xemuw.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/92051017000.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/18215768794.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/3627854447.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/533440934613f946bdcaf0.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/vimojumuvapipogikipukit.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/xakavagexumojeniragew.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/zenaxuwoje.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/74497683807.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/nefogutijozuxerelevikodo.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/noditena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=pitch+of+cricket+lengthPDF 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_off00010ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE2 10376 bytes
SHA-256: c38fe7c9f20ff479d1d9e30de616e124938928c89a9ab78363ebdb9e7bffce10
font_01_sfnt_off00012643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12643 18680 bytes
SHA-256: 470b9ad7ea8ca42c693beb92edada6a18135663094dd213f95b9d2310b08b6c6
font_02_sfnt_off00015735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15735 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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