Malicious PDF — malware analysis report

Static analysis result for SHA-256 223f5e1d2d6fbca1…

MALICIOUS

PDF

76.0 KB Created: 2021-09-25 02:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3f3133e33bdd2e5a2deb0d22b3b19f40 SHA-1: 22aca355a9ce889116709d0f57b7b2f5ebc03652 SHA-256: 223f5e1d2d6fbca1798bbee0ffafd3e5c25600b4a2792eca818bf859a87d1d98
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests the use of compromised WordPress upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3def67582---nekik.pdf In PDF document text
    • https://hyosung-gulf.com/uploads/file/wufutowamafod.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/30556667988.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/xitodukojagaseveku.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/36639474724.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16146b6d84e16e---60122305200.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/lupuboritetokalapagurukel.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/sebefulajepukovopolatoxen.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/pitakajewexepod.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/zetulibivaliwepotuxanukal.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/lativojekexe.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/76013633089.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/sabexejawumusobikivafurip.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/49887799853.pdfIn PDF document text
    • http://safarang.com/basefile/files/97388260173.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/sojugoronavel.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/timosilu.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/jiniterijikufebira.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16147ebf51d099---32609275783.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/41591837345.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ae465ebe1015bab7afdad43d0f941756/90065481340.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/79663725435.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/43656645535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=fort+conquer+2+mod+apkPDF 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_off0000c024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 10804 bytes
SHA-256: 1e2dc7094d1ddb0cd4402c75e52228ea443900d9bbd3c6487205c6d41b4c44a3
font_02_sfnt_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 19008 bytes
SHA-256: 1780b8eac194f6f6442cd8d742f42112936bebf0e75a9a3eaeb48c642d9af8cc

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