Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffce0d47d1d4911…

MALICIOUS

PDF

90.9 KB Created: 2021-08-02 09:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0e822c1e212cea65b0a5bad219d82d73 SHA-1: 35311b64e1a79e4db26631b25b60bcadcb77a606 SHA-256: 3ffce0d47d1d4911ea5c4cbeac888344a04f6e4fb51195b1cd15aac04b50a7f9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0e0740415408b09b2a4fde04ab6086c5/73780064309.pdf In PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/1111984828.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/22806388938.pdfIn PDF document text
    • https://dascalita.ro/app/webroot/files/userfiles/files/30568132174.pdfIn PDF document text
    • http://goldmustang.com/files/files/84157900586.pdfIn PDF document text
    • https://hoongnau.com/upload/files/pazodelewa.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/58473584692.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073d8505f90d---17862843209.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609449987f5de---60295715430.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080928fbb513---mitozalo.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/24201408119.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/1uru5pej9pf054efq0npp5urr3/voluzujiv.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/95942139542.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/79231927236.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a944fcbc145---vowuvif.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/nixamavipi.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/7308819076089b252b71cb.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/687ee1bf6edab795d7592e4824f6fbe8/tinapapegedidivu.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/79959a6072cee3ce4a2f2effdc9bb966/22042583056.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/7279ef3c9afbe317208a755757d585e2/rumoloretidorubasafi.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/kadulemakegikaviwofo.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad73cb0635c---57627372423.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/52767378898.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/73293383299.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/4ful84qtes720q681kuhuj00cr/53213831388.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21b2624f16---javugirawoximikonujeminuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=list+of+figure+of+speech+with+examplesPDF 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_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 11068 bytes
SHA-256: e8c725888686b936bbbc0c6d25752d6909ac775f713bc4f93313af65180c6681
font_01_sfnt_off00011a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001324e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324E 16380 bytes
SHA-256: 44de092bd327e7ba95b6d6cdd2b32e05c276c7cfc8441d45ef9388e51dcc3c80

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