Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7458261329d497…

MALICIOUS

PDF

87.2 KB Created: 2021-08-10 10:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bbec6f3d7ff75fca1f67aa2c8967f5b3 SHA-1: 3c97a4658acf5a44f43c51849f2825a75546c340 SHA-256: 4d7458261329d497ad1f14abcebd5717dabb7017a7bd89fc747d969a56fb8821
164 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports this, indicating a lure to trick users into downloading a malicious payload. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=download+game+fitness+gym+bodybuilding+pump+mod+apk PDF link annotation
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pikuvitoralufupiguz.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/jaborezifezud.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/8fe76bcd82ec37902926b107fe76920e/lomatokijofalavurapi.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/1673023232.pdfIn PDF document text
    • https://losungversorger.com/product/file/83660706121.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/mbtilk69nvgvleid6fsilks5pv/wopotipavinosudemawid.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/jetanexeteki.pdfIn PDF document text
    • http://www.bash.cl/media/file/10430579753.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc89ae7952---76339309345.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/31040509915.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/45083294443.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec44470957---10652895471.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e00a552ce0a---golejopapiponosusufemamo.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/tuboram.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/tifabunilutifomagowati.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/af60711893e14d2f9eb08d5e5e59a2e6/59898947708.pdfIn PDF document text
    • https://doitoutdoorz.com/file/rvTRorl7B6HOvZQO.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4bf5ae34a---fobasidevikiluxibep.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b309877efe2---28540001801.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/xuzad.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e0172be3f7dec3780d03c51bb87f8ab4/36495967413.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/76558921030.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/84225848220.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/kunidipotifeduzajexona.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/92142345239.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_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 16900 bytes
SHA-256: d2805986899a2997a0f8ea115e23232251066d19f0d74dd942a8e9b77488a5cd
font_01_sfnt_off00011c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2C 11272 bytes
SHA-256: cc1eec8f4aae3519406443fa13ecf31ce202e39ebc70af96767a65d4c7d3e28c
font_02_sfnt_off00013649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13649 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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