Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0be4ef45f71a51…

MALICIOUS

PDF

93.7 KB Created: 2021-07-06 00:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 91e13083113575111ea7e67529b0ae0b SHA-1: 491f762af4b39f41f304f436b04f08c5bc25a587 SHA-256: 0e0be4ef45f71a5175e93108e2a220a5c2cb13ec7ef4046c4715a3b8ae385301
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites, likely intended to lure users into phishing scams or malware downloads. The presence of multiple links on disposable or compromised hosting further supports this assessment.

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 http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e990231f8---tadupexomosoti.pdf In PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/nijarifaxamibap.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bd963d432ac---32382944888.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/zapopixalixukujiripube.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/pjvp0qvuue5nci2nitfv2dmnjq/rejazotabovawejadamirap.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089a56a4916e---82912179282.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/nomurevuzofipofudesiforek.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/wirixoginulusibexidezote.pdfIn PDF document text
    • http://southport1969.com/clients/861680/File/95092479127.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160850b2aa74cd---92749830346.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607da38dcd261---17616899363.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/2b251265ea6dde44d738bce1150f5f6a/xolukojo.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/46020925653.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/utlb2uafo53f09ft68osaa347d/basunitujijoxuw.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/juwixofosobomo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea7151a261---27795797148.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/55989dd7d4bf7e0315ecf3888a18ca84/radexopapitewip.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75fa33680f---kewutanirufazin.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/vimaxowo.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a5d0a1fc17c484b2798877565fc1afa6/25721164039.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/liparu.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/32126f258e9a322393218d99fb33e873/norez.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095f0cbc5c60---96661191324.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/dewafefefolak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=all+reptiles+lay+eggsPDF 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_off00010def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEF 10296 bytes
SHA-256: e80363846592f718f5cf326cf8a446d68a69e7d0507a10fda476e37f980d4715
font_01_sfnt_off0001254d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5F 16952 bytes
SHA-256: cfade0ccd94aa01f707873a377e36cbc1d2a0c4e5d3912a9589648e7100d0c6a

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