Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3ee023f996202f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-09 07:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 68a4cc16c462be164efd24b07bbb40c7 SHA-1: be32190afac13d3b8cf3dfc8acf06b23cc8df2ac SHA-256: 9e3ee023f996202fb410cb68e8ca95780375fdef8a221171eb0c684f76a32e93
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The embedded URLs suggest an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16135db796c5ec---nenibe.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161360ea41ea6b---25408174154.pdfIn PDF document text
    • http://ed-union05.ru/files/file/kidasapigomuwuzibogivexu.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/eb923359f5efbcb32fb36902ba207b4d/jivovab.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/livofen.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/60278587802.pdfIn PDF document text
    • http://vodnik48.ru/content/file/ruvebu.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/79050609075.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/18153169091.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/gijupotaridisujovavozifu.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/doroxogomenufu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161380943013ba---gimoxezipomedewafazekuvaz.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/kojix.pdfIn PDF document text
    • http://hasadtemizlik.com/upload/file/benimuloweviwifit.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/zixavekaxijirazime.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/vazefanelenavuduvib.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5bccc32e151ca0dbdd2d781adb1ce9b4/58547312484.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/nijudivepufiletofedigu.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/82455773508.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/25168153383.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/katokefemuxaja.pdfIn PDF document text
    • http://bastola.org/userfiles/file/tufexomusapijowusedimo.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/zelanipuberowepaza.pdfIn PDF document text
    • http://canadianrockies.info/files/file/50867211272.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/vppsq7p96dl2noiv4f3iniu1tc/zitajex.pdfIn PDF document text
    • https://togelunited4d.com/contents/files/fexojubam.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/16148886358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ml+hack+mod+apk+downloadPDF 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_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE86 18180 bytes
SHA-256: 616f1000703df850db363e66f4ca9d095358861042f55bf451aa56c2c11ee343
font_02_sfnt_off00012e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E25 10360 bytes
SHA-256: 09780e1cb961a17ee32e1bfc4f41a4e5dd715fb1d64d5fe3bdf40788793d036a