Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddfd59cd96daef2…

MALICIOUS

PDF

70.2 KB Created: 2021-09-05 21:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 90f7c23c10f4c042c1afb65fa170a341 SHA-1: 96d36cf55f7557d1ef63227fb7474668165bc62f SHA-256: 7ddfd59cd96daef237424fb07ba0b03393670d327653de8ad244b6dd551f66ab
176 Risk Score

Malware Insights

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

This PDF is identified as a phishing lure due to its image-heavy nature and embedded links pointing to potentially compromised websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or further payload delivery. No scripts were extracted, but the structure suggests a classic phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://hubbardfamilycircle.com/clients/62940/File/kerupewalafoxotezi.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f87587443ac---57253291757.pdfIn PDF document text
    • http://duet-czluchow.pl/userfiles/file/29212672912.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/7gllmvoernbjodju9g2c2d5rt6/91734642199.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/teborupivamijaxozalij.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/winitimirubotivilaxe.pdfIn PDF document text
    • http://balone.net/_upload/file///lumoge.pdfIn PDF document text
    • http://primaneighbors.com/userimages/42843267501.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/7c144b258d3ce84256764700215e18bb/wetoxisevekosabafito.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/96659730470.pdfIn PDF document text
    • https://parkettworld.com/upload/files/rotinidowom.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/28185724397.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b9dc62a942b---55999124224.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/nenumifix.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16109ae2a6cc4d---tamujefuxunodajozetip.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/72448762451.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/pibavuditadilawumezuguk.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/gorafofolofogobegonilojuw.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/736a8dea026590d3bfc157a7f582d1dc/23096027084.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/72836826564.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/bb0997112bcf5bc1ae9fba3e85ea6fb7/34763257538.pdfIn PDF document text
    • https://nasikampung.info/contents//files/wumitewazalodabixidoroji.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/l9hfitbniahkjl17pme05ob158/38433383763.pdfIn PDF document text
    • https://dhesient.com/media/52836288943.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=giving+direction+worksheet+printablePDF 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_off0000b4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFA 14608 bytes
SHA-256: 83253d17399ced84ced7223fb9846a694f2ce50751659e5f529fbfe2a70ed647
font_02_sfnt_off0000f123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 11216 bytes
SHA-256: 5ec77c57ddf4cc9fd5b6198decd592cb8cec8ab44b7264067c38f830a064628e