Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f4116708b8aaef…

MALICIOUS

PDF

81.0 KB Created: 2021-08-29 00:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 70c07e77806934231403c0c47d32ad90 SHA-1: 2f053d6d5c9eecde75555cb20e5bae8bfaa5c46f SHA-256: 04f4116708b8aaefec1b327cc725415561dce53863706887d8b2349f8e8dcd56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The numerous external URIs, many hosted on compromised CMS upload storage or disposable domains, strongly suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection further confirm its malicious nature, likely serving as a lure for spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://garglob.ru/uplcv?utm_term=pine+lakes+golf+course PDF link annotation
    • https://zohopin.com/calisma2/files/uploads/pujusubupade.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/mimutodeninalixisakosa.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21bb13321d---fosugope.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/voxotaxakoxiwiwam.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2a8ac22b8---morezeveturuwerum.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/senumexora.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c94a4b58c68---49541790819.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/e79fb3feca2a8baa662b797089c3336b/27743059536.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/77401588458.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/dotekavul.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/45274987805.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/86457182223.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/bigigufunisoku.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/l0m6srqr6tkn4vfmf42cmj5fvo/fapumejaxofuximoduw.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/49789554967.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f50b20f8d24dd83c4680a4c2ece6d14d/vururufapusunazonew.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/laragujom.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8fc651eb2---38519725690.pdfIn PDF document text
    • http://fxmeat.com/upload/file/00e5286b4fbe7bf81bff08eec6c8f2e9.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/10652991027.pdfIn PDF document text
    • https://alohasafaris.com/files/66041597367.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/72509163982.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/lawugatinoj.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/40119360030.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_off0000d60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60B 17776 bytes
SHA-256: 3141942bed8469f8b386c490b76bb7a9ff6d7a6e5c3bf94f7830819949b5bbff
font_01_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 10608 bytes
SHA-256: 657d35ee4302035758f64e9e9aaf8b06137a6a7d725c6d5d255ea1a6ff160472
font_02_sfnt_off00011c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1