Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe40adb8a1d15d50…

MALICIOUS

PDF

118.4 KB Created: 2021-08-03 17:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f963180e346692950f6065a4d4708dac SHA-1: cbf4720143ae8f0eb39411e1cec1cb4a19d94216 SHA-256: fe40adb8a1d15d508a3e72221d4b93f4224a03443b79a5eb5af74723ac0af014
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The primary function appears to be redirecting users to external websites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://archism.ru/uplcv?utm_term=historia+de+la+multiculturalidad+en+m%C3%A9xico+pdf PDF link annotation
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buzimeririjud.pdfIn PDF document text
    • http://fxmeat.com/upload/file/97b16efd839e67415346292be9f99202.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b28848ca3---benemelijut.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/mdcbus0ka39gqb80csk1ev9bg4/89274203206.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2258d9650f---41968131793.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/71bb22e0b327b8e99c9ef44c562ab5bf/rejot.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/36354240865.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/79590295957.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/40962042612.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/xivuzemasamemusikinikaz.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/lf7jmp07uo141d3396d6m7fiqt/lukulurimuf.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076497184ee6---72634237177.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/li2rdmbq61j6hgsk3373jlj1ab/79812115465.pdfIn PDF document text
    • https://mszukam.pl/dat//file/zejekunubijixo.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a372b6dffaf---57168258025.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/ce3a5c64783f9748666540105f421585/70131649951.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/43093038416.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/kojudufusenelitej.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d76e4c5ef94---lekagavomenagokup.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160839618db0c9---gijizopel.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/4e1039ffeb6f30e777c3321619a95bcc/rubegivudidikinofigirug.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/fukegirul.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/98283208506.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/7290031396.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_off000163fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C11 11128 bytes
SHA-256: af4590f5fa561a406d756f4e67156bd373442e71c6999f5d25871caad4e74b60
font_02_sfnt_off000195b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195B5 20368 bytes
SHA-256: 0b746c2e9c90d055e7edbb8063fa5fe17d6c27456033f16a526b528436ca321b