Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b0c5baaf149c97…

MALICIOUS

PDF

90.9 KB Created: 2021-06-08 22:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ce22b7ee2bd35d26dcb60b1b5a29f1e9 SHA-1: 0594209d823faeb148e18912f9d33947869fbf1d SHA-256: 75b0c5baaf149c97d66c0bd456b177beb97ef45d8bff8e921801a34d89b6fa07
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/uplcv?utm_term=five+nights+at+freddy%2527s+4+free+online PDF link annotation
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/3d49e645cf87f039f6e1ddb62acbfb61/ganabebojegiwuno.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/r6tl7k7c7ih75v7i9f2dehb6g9/sapobovuraje.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/wesusetes.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/aa4b46728d5644e940d22d0f786876bb/98051283045.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/3f30a296846324f4295485fb6b9efa34/bowubumu.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/83173121645.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc5e910de3---ketedeget.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/ravegevopiporasofuge.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ae770c4bb---jopis.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/78949137638.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bed732cd7cd---49234572123.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f93cbc560---newimugokololazetodike.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/musuwomasidisixoxepedijuj.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3eb2d565e---firuzoruvanusotabasofekup.pdfIn PDF document text
    • https://medtek.vn/storage/file/73368905283.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/882ee7ccb23e994c08e1cad3d16ae6fe/gadavanavobonopobusabobet.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/67eo3mp6q9ferd5u7qbbo11n5d/67576611254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00010d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 5408 bytes
SHA-256: fe15aa7f51c4bf5cd5ff0bc6152eef414e002d8af6972033d2d69f566c1e3ce7
font_02_sfnt_off00011fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE3 11976 bytes
SHA-256: fd24844bcfe22a6520781fe6106b7c1a09d77c7524344ca14209a1dededf84e9
font_03_sfnt_off0001471d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1471D 16648 bytes
SHA-256: 72cfb1f708e0e4de17432443410c4437cc449d9274814c6b4af8749a918f4c5d

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