Malicious PDF — malware analysis report

Static analysis result for SHA-256 490109454a65d1cd…

MALICIOUS

PDF

93.1 KB Created: 2021-07-26 13:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3e0e8ec9f8115bf97fb0dc200699e76b SHA-1: 2b2c89cc5fbe2faa2f715baa10dd08e227fddbd3 SHA-256: 490109454a65d1cd14b138e8c77b5fc6574a4416bd6becb45796ad6fb16dc417
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links pointing to potentially malicious PDF files hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or phish the user. The primary attack vector appears to be a link farm designed to trick users into downloading malware disguised as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1987391d41---89683252879.pdf In PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/83750774151.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210703174842011.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608589c10f523---mobipivofegadivofokujedi.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021071600031870554.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f56b4ef55---21953753504.pdfIn PDF document text
    • http://studiomedicoveterinariobellucci.eu/userfiles/files/kotegaw.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16074662099d60---80117060210.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c896a1c86---4672211636.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/aa79bb449d264aa59b5ba123a5b468ef/ruwoxufogovetuzojokeku.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/mijulutirobixa.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/56064977416.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/o0dmeuiqrivrvsp94k476l1k63/70358888735.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/74083701773.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/nemasefenexenepor.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/vipuzowajidoraritebimoki.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b6228f63c1cf8984e00fe8387a72c08/96085339202.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/xiwidativaxikelasamovem.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c572674c477---96104265834.pdfIn PDF document text
    • http://web68s.com/upload/files/97736913241.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/kj8dpjn4o5blq0pbbq2j091gt2/vewam.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1c8vu7am1bmevjua61jketo273/dujiwatovafipav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+find+rim+size+on+truckPDF 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_off00010853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10853 17184 bytes
SHA-256: 993e5442040a4c3b1fa28471905257f2ef4fa4603f7b22c19b1f5718e0bc656d
font_01_sfnt_off00013539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13539 10760 bytes
SHA-256: 6e9837c5b27e965b71b8cc51376c0479b99ef2b2e4d2c87c4656a947d97a6731
font_02_sfnt_off00014e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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