Malicious PDF — malware analysis report

Static analysis result for SHA-256 40aa0a96dd72db40…

MALICIOUS

PDF

138.2 KB Created: 2021-09-04 15:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cc59f60604cbfd650084b33cd8248b1d SHA-1: 54b3a5c9c19799f1541b8ab2bf71b8ad17c446e7 SHA-256: 40aa0a96dd72db4005fcc5ecf6d30e4522d92835cecc75773262b15e8dca60b8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://laborke.ru/uplcv?utm_term=ramayanam+story+in+telugu+pdf+download PDF link annotation
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/nm3a78uj9l0alp94es83nh0kee/kopogaraxax.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/ruxutojalelenebimutagifij.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b41639061---17226568154.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/i9sb03tlnplv9qu56mu6gbbc95/71893368788.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dfe574cc6---51255720191.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/95698891136.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/5201420105.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f9ca3a4ca6b---46767439795.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/d2c8f4cf29f60e5ab224121a91bf89c4/ralopuvoribugegamipale.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/59419771159.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf6c108ef7---40216614861.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160717e6d32cdd---tazafepapijunef.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/lilowolemenonigojozefewog.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad49321ab1---36099542480.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dfabe146f---91900103936.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/zaxirufegiki.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/6a70c10247e04d09513ecedb30cdf937/34048409150.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/977469836.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e66cb8417d---8131670856.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc64d01cc86---88710786720.pdfIn PDF document text
    • https://ev-owners.jp/userfiles//files/49658080032.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/481024412f36f20a601baee459447a24/33689660922.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/naxoluzirulokuposomeba.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/pubenabepenoro.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19587 23296 bytes
SHA-256: 2401db21d428c1790d4e10f2b6180cb9b6d0a5ab9e69c55f2cb5507ff41d1ad3
font_01_sfnt_off0001d1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1C1 16408 bytes
SHA-256: 16b61b2a4cd9606f3f61a677b41c7e6f1f83abcbf5b4aa03bc6decd8458851af
font_02_sfnt_off0001e870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E870 11188 bytes
SHA-256: 1834c8c39f48308e88e277f4b9763b459fbb495ebb1cb1b03ef2920db0b2dbaa
font_03_sfnt_off00020284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20284 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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