Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a8ff96b8155660…

MALICIOUS

PDF

69.1 KB Created: 2021-09-16 03:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7b506cdbcb2394ba966aad5475b1ee07 SHA-1: 8ffed0ba600ede33dd6d001da3f08510c7aa475b SHA-256: c9a8ff96b815566029189dd67c056df18cb4bd56da19379f08046cd0cdf3b883
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The document is structured as an image-only lure, typical of phishing campaigns aiming to redirect users to malicious sites. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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 0 text block(s), carries a click-outward action, and is only 69 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.
  • 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://smidgel.ru/uplcv?utm_term=god+of+war+2+cheats PDF link annotation
    • http://goteneplast.se/files/images/file/83623369165.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/samusoviret.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/55104842174.pdfIn PDF document text
    • http://sbairs.com/datas/files/naxijokotan.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/sagoxiremowudilisezu.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/taxogupuroni.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4f657d59902503e1b98b3ede10d034d1/nirazelekizogedotuvas.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/26065900160.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4a02ad288---wezexeresikamibudixaxo.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/piwoxu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4vhhg0eg92qf4aktmb8k66k3u4/lukudesixon.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/melepamenudaxuropaser.pdfIn PDF document text
    • http://micruts.org/userfiles/file/5193908735.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/lanolapidodamalig.pdfIn PDF document text
    • http://primaneighbors.com/userimages/kafarepita.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/53327899963.pdfIn PDF document text
    • https://12shio3.com/contents/files/39998998189.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/02fca0850ff25dc6a2b6d6957dbeec5a/gokifiliwakimabojo.pdfIn PDF document text
    • http://bamor.org/userfiles/file/barufimumubiguzuponopun.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/3b43ba1a26b36e20348a9f54c7fb9267/kafedonuxezarin.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371e11abd91---70859978639.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a84537d5a3---906697075.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/ruruvu.pdfIn PDF document text
    • http://fullerton.kopanramen.com/uploads/files/31306406237.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_off0000b3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AE 13992 bytes
SHA-256: 1ffebe81faa048cac22503ebe1c66d0f041f4350fc8c763351141b13b4836c86
font_01_sfnt_off0000d62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62F 10576 bytes
SHA-256: 0bb92491e268b8d5efdd2cc71fe5081b264b8f143bcef851ed82c610480cfd2c
font_02_sfnt_off0000eeab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1