Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcacd78ee2c42833…

MALICIOUS

PDF

84.8 KB Created: 2021-08-21 10:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: e1ecddc8fe6fe11cc9aab95e820b27d5 SHA-1: 83300c115a880bb5f348b4e4d51e3306cac73981 SHA-256: dcacd78ee2c4283327eac70663bd8c42a2e256603b659a97d83a4b8b697e3712
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML_NYX_PDF_MALICIOUS and ClamAV, indicating malicious intent. The presence of embedded JavaScript and a link farm on compromised or disposable hosting suggests it's designed to lure users to malicious sites. The document impersonates cloud services, a common tactic for phishing and malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://centrons.com/uploaded/file/140909020260d380f1590eb.pdf In PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f56660fcbfd10b3394c686a34a1f6406/davevipupe.pdfIn PDF document text
    • http://easy2ticket.com/upload/files/91002549010.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16119c33b9c36e---4230517340.pdfIn PDF document text
    • https://cubic.is/userfiles/file/defexugojitesitutafalij.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/acbde84a49699e9c3fc3aeba0f8ab45b/22920568923.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/ripozavuzavadetusiwada.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e40853f67---57353506753.pdfIn PDF document text
    • http://freewest.at/rixupusudilonofegitekox.pdfIn PDF document text
    • http://1000projects.ru/upload_picture/file/87629200392.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/498f97fb352ac8de0b844b6b5d57e287/45195847810.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/77732510818.pdfIn PDF document text
    • https://soechi.com/userfiles/file/56988475242.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2f4be3803---ropabubulasog.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/ba84c247202fd6add447618e261d68a6/80308176814.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/74405684756.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/roladim.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/30706e4e0f7b75a7bb6f91cec72bb626/4142731723.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081b14b45fe4---gibolejikuvurowab.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/03e55c6f83de625cabe744804940791e/56222775455.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/51904094597.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/duwabopavumun.pdfIn PDF document text
    • http://kalikraft.com/images/file/jalekanelokebe.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/122de42dc6ca8f35ac8f348a2ef6924e/sojalaweb.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c548025ce3e---pozimogin.pdfIn PDF document text
    • http://s-box.biz/upload/datoteke/vivosivawedaxifiranuzum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+find+a+shared+folder+in+google+drivePDF 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_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001012e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012E 16628 bytes
SHA-256: 0d6ca5d69f909cca801fd64217741a0f6431886b7fd4b7910da2f09006544832
font_02_sfnt_off00012c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9D 10776 bytes
SHA-256: 45c770d43aa7116dbbaff027aa5d2667e3733103072d9a8e78802ceab131aca3

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