Malicious PDF — malware analysis report

Static analysis result for SHA-256 230947ff79be3cd0…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 00:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7fe51555df0816dca5c4c00bc228fe32 SHA-1: e2a86ae22196ad3a9041406a09e1f7cfee9c0363 SHA-256: 230947ff79be3cd00fa1ff767ee5378108e9080f5a60918782286d9084e35c84
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded JavaScript and the presence of a 'Browser extension / update installation lure' heuristic suggest the document is designed to trick the user into executing malicious code, likely by prompting them to install a fake update or extension. The numerous external links, many pointing to compromised WordPress sites, further support the idea that this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc6a522e77---masugolotadolupavo.pdf In PDF document text
    • http://arcomproltd.com/userfiles/file/luvomafikigaxewufolususod.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/naporobatil.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/96289440132.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/16500059827.pdfIn PDF document text
    • https://fultoys.com/userfiles/21714718619.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/it0p8ek1j2m21hbtkiqclt30i3/15704170546.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/78170101479.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/58688067798.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160784d9655717---95686831531.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/4e2433a17074ab2ebcdb21afef8f4ac0/48983332728.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b8fca3655---jogikuvut.pdfIn PDF document text
    • https://ocbond.org/userfiles/files/37083754584.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bd21ea773---xidosefetamabagidex.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19a7c1763f---fofiworekujederuxafokidam.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/1347dcd5ae5f49c2dcb7115cb5fc437d/9242389371.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/ab2bbdd76738cd38f04ca5d88832cedf/fowitexo.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/ahfc6pu6h8vkai20pascgrnktd/ginadeli.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/t0oibe9nsk00bkiru4el08h5dt/70413612424.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3d01d7629bca15b6fedff25f99c30e2d/7318855040.pdfIn PDF document text
    • http://airsoft1.ro/files/file/44582369917.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/1l7go3qj5shcb9scsmskmn76e1/74653957989.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/rubobujafud.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/801cb8823d869af9a4ba855bf007e9c4/99199933074.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b06c55a71---pepapowuzutizagujoxogave.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=cooking+cracked+corn+for+mashPDF 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_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 17552 bytes
SHA-256: 3058baf347d56f6a78311a7f37706eb859516bc81e0b62380a052264c774d0f2
font_01_sfnt_off00011ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC9 10900 bytes
SHA-256: 45e7eaaf9b4844c786584bae315f3f17d37f82b667afc1499cbcb5e68dfaa7df
font_02_sfnt_off000133ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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