Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c722622b5c753c1…

MALICIOUS

PDF

147.3 KB Created: 2021-08-26 14:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4ddcb396cac40a69bf9518369fb8a5cf SHA-1: e5973c057f4efc2b60f3f8ebc84b46b0422fcc18 SHA-256: 8c722622b5c753c11314205b57ef4af366dc0718b9d7275cbb5258841ee843a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure suggest an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9716

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://garglob.ru/uplcv?utm_term=philip+prince+young PDF link annotation
    • https://people11people.gr/uploads/File/63129890283.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/nesonixigenepatozumigoze.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/kll7a086n6lge9a1q19cpfh2p2/74389493536.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/7c57e5857ec709be44b4e4dae557e15c/kafopibebigakuvan.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/86097279839.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/97217117228.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/13375519975.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611362ebf0d7f---96335883679.pdfIn PDF document text
    • https://menu2uplus.com/images/file/88415744951.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/dojojolitifiniworozezu.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/zoderizukosanamudu.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/norix.pdfIn PDF document text
    • http://home-delighted.com/user_img/files/68355148134.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2cc908cf1---womepepejokisopobasexuf.pdfIn PDF document text
    • http://jadever.vn/Images_upload/files/45072961568.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2110958778---lidamaduvoxidavuniw.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/97733213520.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/rewewilarapapukan.pdfIn PDF document text
    • http://petrduchek.com/files/rezur.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/em82osj8a85dq79553tq77cf49/pirolikosojitukez.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/c5eefe69b0c22ccaee79794435b7afb7/29329292012.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/sebatejazata.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_off0001de11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE11 19104 bytes
SHA-256: d9587430368e4e2ab5138d9550089059dd876b27faa186091264bf4b6476199c
font_01_sfnt_off00020f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22727 10440 bytes
SHA-256: 2a1c1624ceada1364344fe8321005480e9829a56b7ef8d3852019ad10e051a10

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