Malicious PDF — malware analysis report

Static analysis result for SHA-256 228ec1f85acf8d8d…

MALICIOUS

PDF

82.4 KB Created: 2021-09-06 02:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d7bef075abbf0ca374c5462b4a4b14d8 SHA-1: 1db05a02236e942784d998ccc280a4f2f165adf4 SHA-256: 228ec1f85acf8d8d3ab9cb7e87bf91522792b08074ba0b11894b7030248a791a
156 Risk Score

Malware Insights

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

The PDF 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 distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2ce900a8c71d7af239d0c9137e1b4a9d/69375186424.pdf In PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/datonurela.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/4221148848.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/81696603013.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e9eb2d1349e9947d44c48fd86afffd74/goferi.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4f6b08ad53---didezanixomutulono.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/723749d5fa0fcae63bcf3899066c68d6/nemajisak.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5a6d30b9e---bipulajulesifopogog.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/63697066016.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160933f742bb6f---9678765829.pdfIn PDF document text
    • http://northcity.rs/slike/files/gabusomujuj.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a628b462d5d---61093722851.pdfIn PDF document text
    • https://fetogram.ir/images/upload/files/53324504698.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8668c2d4a0---wemoxujunuwenadodane.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/mesilutelujupodabon.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609016b4e9eac---37845359195.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1624288922.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/39718528148.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/3e6e01464fe98a1799cb10f3733b6d72/6506718808.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/4417ad9ea25556189e1a5650285360a9/96489576710.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/jupisexerexe.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/to45fnuqe4c9ubmrtuqpok8963/tazarifuniterovajuzawid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=portugu%C3%AAs+dicion%C3%A1rio+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40A 21492 bytes
SHA-256: f9caa90528f0e50784a4d578addb397a28900f9f82491fabd10918919a78e7b4
font_01_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 10896 bytes
SHA-256: 48276ec868ecbc869e80f74e854da7a303f6c780bd1d33cf36db119b32e04893
font_02_sfnt_off000122b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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