Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee8b097f476c9c8…

MALICIOUS

PDF

81.0 KB Created: 2021-09-08 11:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 35cbd78773ee7dbe82ccc3a8ede8d9c4 SHA-1: 7a3c5586dccd925cbc1f623ba251e96e5947f36e SHA-256: 7ee8b097f476c9c8c03174b1e267d9e0c80a4442983c600f23d64eaf8b11ec43
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting suggests the document is designed to lure users to external resources. The primary attack pattern involves a phishing lure, likely delivered as an attachment, which then redirects to a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://agendatourvietnam.com/hinhanh/file/tozawox.pdf In PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/64939109595.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/vawigibolegudikotejimajul.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/pobesasixubizijojafileni.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/lagok.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ee533efa9---zezolukowebep.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/41270045851.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/sowivekozurafala.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/59280847145.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bedurovubisovutewozerulo.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/d72ad58343c8d9f1766a723ca35daa9a/kiwijawixidoxefutelegenus.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/68433131403.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/bacda08295ee1046d6bc201c0519f1dc/jizewulufaniwemixijuwe.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/24087468763.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/3402785051.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079e98e896fe---wisukubaboveja.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c5fceea3b---vagitovifumokogo.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/25738828349.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/8764612894.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/65121249256.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e9ce9484d---dofaje.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c210df9c794---21618690740.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918dbcd9242---56846184957.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16087a5ddb039b---sigixix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=irac+method+example+negligence+pdfPDF 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_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 10952 bytes
SHA-256: e54bcc398ab7bac89e4f9ffc489a095587bf7221e8e19e42a911dd39e6607c27
font_01_sfnt_off0000f06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 17896 bytes
SHA-256: 221a95181cff665b90277a14641d4aa8c07cfec605c603f02e54d97217126f2b

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