Malicious PDF — malware analysis report

Static analysis result for SHA-256 456eeab3762c7c60…

MALICIOUS

PDF

92.5 KB Created: 2021-07-13 01:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 114422f011db21c809737195f24511c5 SHA-1: f94e71dc60da342c0f629d4b9cf5073c4adeef68 SHA-256: 456eeab3762c7c60cbbf97d3c57f6827f58bab06116e669a2309df4d69b4b3b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://pixomot.ru/uplcv?utm_term=fruits+high+in+carbohydrates PDF link annotation
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3a4324f5cf7104d1830b40b7693ed49b/65334927400.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd83aff99---65782525571.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076a1e24ea9c---53577981657.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a54cd3f0---malumawevudizimosorozibu.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/dofarowak.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/luvag.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b265a0e62b---momenafukalor.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5vk8klu6vm9jft5l07ri7k1l51/60979262431.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/jurexitopixi.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/87135896b8763983fc8ca35d62e34d43/dobativegomanezusolemida.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/diwibulosodafejagob.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078e2bb7aef5---sugutuduzufejo.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/60623158926.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ab396d80d---favinufitixem.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/2d81576896bac2da82196dec854495c9/44495195143.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609655bec0ab2---66550686527.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/18051021979.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607945ff5ea84---dusuwevuvoxenukasuwo.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/teketirotanedojakofadivub.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/62177846270.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/71531027632.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160780f4c2bc81---71833020213.pdfIn PDF document text
    • https://premium-house.uz/images/file/9674728762.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/84722456550.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_off0001067e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067E 17088 bytes
SHA-256: 9de3e5a755ae0831d5d56ffcdf9e3102b97931f3facf192c1baddc3ae9215d7f
font_01_sfnt_off00013356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13356 10936 bytes
SHA-256: 82806e1143d5c2ede10480b01cbf5323f4f757646673026da9c453102879888a
font_02_sfnt_off00014c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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