Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee58722004d091b…

MALICIOUS

PDF

134.8 KB Created: 2021-06-30 06:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 4a0fe0d857aa7d13af6e721734c0a459 SHA-1: b0b607a8740771984b80e2630383c71595d79077 SHA-256: 3ee58722004d091b21026e5901d0939f7127abf53864dc886b01b546a6ee0533
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV detection and ML classification further support its malicious nature. The presence of multiple external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

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://aedwea.com/upload/foto/tuvusazovujonaliv.pdf In PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3f00bdf43afcffbe799716324f99817d/68792920251.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/vopivekokumemaz.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/v5ig8dmn2mgbnn294sebb918o7/buzikedipusipiro.pdfIn PDF document text
    • http://fitviewer.de/files/file/29710072573.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/a82b32886a02af334941a26be12cf180/91207790390.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/42213337141.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/29f3351840fbfeb7d6545531f88656ff/63080558170.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/sekotijarutarovuven.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c428174c95d---94715810951.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/23005135169.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/levapebadafadalazanezo.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bbca00b9c---16341844608.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/64024908852.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1c77436d4---61099109566.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9b7c7c74e---51203693334.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd333fa45a2---75915313478.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987fd182d7c---15002756051.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/xoselezaxenabiligim.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/85047522580.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16085ac60139dd---72067219978.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/84982957581.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/nuvamatiduxalujimeruteril.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/96387949523.pdfIn PDF document text
    • https://asi-filter.pl/files/file/39225796525.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc2baed572---xikibafatebimodi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hearthstone+knights+of+the+frozen+throne+adventurePDF 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_off0001a86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A86A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C07C 19308 bytes
SHA-256: ad5845430577859ce16e6aaec3b7af5d7a8ef2f885aa1339468aed2b18f9bb32
font_02_sfnt_off0001f3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3F6 10896 bytes
SHA-256: a8a50ada4c660b50f38d19d9b6ce7d3fb4bf8b03e2910277fdb5d15bab42321d