Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa510a54c4f9f23…

MALICIOUS

PDF

70.5 KB Created: 2021-09-12 17:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a80334232620e3e14d09d883f046ed07 SHA-1: b96c0fb3f73b59e1e87008d4350800ee050dd769 SHA-256: eaa510a54c4f9f235e538fe338be58bf0dcdd92056d99fc9d250e7f2fc5f143e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and appears to be non-readable content, typical of malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=youtube+thumbnail+maker+apk PDF link annotation
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf3fed9d6b---maragawuvadedijisolewode.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/bemikuxifenupidixiburud.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/28940847998.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/aad8f5950d5ea57c1a6645abf0b4337f/40359628677.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/luvufizipidolu.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/60883602076.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/turaxovute.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/82962820143.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613467f8a928a---depip.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/62565141838.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/sonifuwumanixazaso.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/15733386990.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/91106065431.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d14234d14---xusowowesuvogoxipa.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/60655290031.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/1657171020.pdfIn PDF document text
    • http://a-pluset.com/userfiles/gesabitibepeki.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/gemiravotubaxuniniwonezu.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/65649206666.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/23232670567.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/ruxosuzumujug.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/24679833162.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/83379542093.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0b27e732fd23f30a6834954da39add85/rixosevirafexuworopade.pdfIn 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
    • 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_off0000b6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE4 10664 bytes
SHA-256: c078f0f5c6ab0af496b6ac1cc13978ba9d8e8fe3f4d61a10a67a7baed35b95d4
font_02_sfnt_off0000e6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D9 14944 bytes
SHA-256: d7c21bb56308be482aeda56b5e3a548d7245fcc4fb401550ed64bda03d02e5e8

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