Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7103dadb0fb42bb…

MALICIOUS

PDF

77.4 KB Created: 2021-08-13 08:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 90f64ea3be8cfb6836cf15a79e6f8cfd SHA-1: 1cf4faa46b70de9208d230d8056aa9d9934e0198 SHA-256: e7103dadb0fb42bb16e3661dcd796a58a9034230fa8cbd4ec1957e0b01987b5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/mdqc0rqcv5m9kcmib81t3poegc/43986339250.pdf In PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef41605b2a---78220068203.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/91843803140.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/gotonitenuzade.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/9299ac4905cc6845cf3be87b62a34d09/luzifitidorado.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/23664280312.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088843d69212---tuvuzesoperuzasi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/58372184017.pdfIn PDF document text
    • http://yulintimber.cn/d/files/mokabulatirajizel.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/88702624699.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/vobaxetuwu.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b0701f811da32ab08d6e539a13e25679/11064458238.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/42072867233.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/32143506443.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/c05c5bacb2d357cac99cc8da7a305c71/13884879919.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0b8e65fdd---jodowokopidevo.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/552321060.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/gidarimibasolafewe.pdfIn PDF document text
    • http://veivel.com/userfiles/file/farinosi.pdfIn PDF document text
    • https://heyratacademy.ir/file/xojolazamimedeguxivifida.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/mijavopixusuwesinezer.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161060d6c71b2b---97751401524.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bb8daa8f---julovelapewem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+search+a+phone+number+for+freePDF 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_off0000cbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 16420 bytes
SHA-256: 5c696fe9c2265720a7e7c8b9bb99c4b0ee2012d7f3d26f521f0f8b83e5c2bd31
font_02_sfnt_off00010e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5B 10924 bytes
SHA-256: 72ea4c3dd619771f0f81bf45978c4025deda8d069ae9a5d126a0ad1f12a285bc

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