Malicious PDF — malware analysis report

Static analysis result for SHA-256 1048a645aea04cfa…

MALICIOUS

PDF

146.7 KB Created: 2021-07-18 01:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c8322ca819f0eb3be00f5105b9dd1a1b SHA-1: 0567024d162118a88cc1745a7d531ad3042319d9 SHA-256: 1048a645aea04cfa9c16d7880051468beaecaecac47eef6af293309fb8624eed
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abe2851a487---bevukorobubew.pdf In PDF document text
    • http://abpaluso.com/upload/file/5280594826.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/88742814565.pdfIn PDF document text
    • http://sam-global.info/files/file/webuzizuv.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/4c1dc65f33dbd374c9fa1c715a6c59f0/bararobefoz.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/89934766794.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160acdca5e1266---wifadisipana.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/luwoferadobexadomobu.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a978ddebe32---27068426544.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/d7vbr4cf26oru8itbkno5i7cvh/tajodovufizepow.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609850f7f00fd---jowiki.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/25874405272.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/70319312128.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/tepir.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/7941389ed1d0db1c73a0a6f6627067a9/jotesig.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/8c78b136b3291c42e3ca03f8ebc4d321/lesak.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/61122636408.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071263d00e80---zebejaf.pdfIn PDF document text
    • http://atomleasing.ru/media/File/zivif.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/3252036fb6db98d9bf31cb095e19d2c8/sadapelu.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad8549a77---paxadigimuvowedu.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/7a9c6075034696deb13616e3c7fae246/20672428061.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/88687464306.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kematafax.pdfIn PDF document text
    • https://hojoairport.com/images/file/34153824112.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=21+years+in+hellPDF 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_off0001dffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFFC 10176 bytes
SHA-256: 61e0356ec8193416a088441c8b801729c886d2ceb62443c2e886a6fdba59d1d2
font_01_sfnt_off0001f6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6B0 17692 bytes
SHA-256: b5c92170f00fa5495cca423a50d0d9d74c6f90db95653799b481b97413e205ac
font_02_sfnt_off00022571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1