Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdae4e3d62ee81e…

MALICIOUS

PDF

87.7 KB Created: 2021-09-03 15:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5c03965e332a699773889e0d75e1bcf6 SHA-1: 2f3b398053afae124076d3d47075085e4ffff43c SHA-256: dbdae4e3d62ee81ebf7af69b33f50852eed60573eb96469adcf370d5af6418ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The embedded JavaScript likely serves to facilitate the redirection or download of additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nitdgp.ac.in/uploads/userfiles/files/76358021705.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eaed382404---92421254198.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/67008084193.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/42343592588.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607329058a171---77251440009.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/afee462d73da47e22f89d4644aa65d97/98464801188.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/81872625988.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/20a62cd66d018fcdadbf78bb5408f32a/visufekeli.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d57c8ae8047---78529785385.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/45943491594.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16105fdf2c358d---50650314801.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/jagoniziremiwasadetif.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/fv5fc209kqsvpbq4qv7tan1t2b/teludixugij.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/qof7b67ukqb58kb5viflj547vp/posax.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/10751790502.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5270501076---1365051252.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/58395344388.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b542b5d00e81587026306244b6e92aae/78017984796.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/nepobogovafegemubunud.pdfIn PDF document text
    • https://pacpartner.net/images_client/imagesfile/vafajulenofo.pdfIn PDF document text
    • http://ashioke.com/images/library/File/8492322165.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/271fd7548abd73c90e141e9fb80550b1/44256378762.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc6b66b496c7dd4ceb82f62106d806b8/25880991081.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/powunuxazuzukikavumos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=breaking+the+law+guitar+tab+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_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 18336 bytes
SHA-256: d1ff3a8fd6f3ae63a0fc7a88f6dd130b34edf324fda33e6791e2d56a0ba5f826
font_02_sfnt_off0001383d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383D 10960 bytes
SHA-256: 43cf045edc2acdcfc752b405bd8a15d0ff8e92c1afe03a61e52fb123f3b1fe8c

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