Malicious PDF — malware analysis report

Static analysis result for SHA-256 f570c873ae507863…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 12:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4eb7eb2cc08a491799155cb10b71546a SHA-1: 0612b90d6f9ed479215dace5e9b1133182ed6224 SHA-256: f570c873ae5078631b7b70acc13000acd0d319a0cbaed9d0739c7a8ed38387d2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, designed to redirect users to external sites. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://roshnaai.com/ckfinder/userfiles/files/79567302673.pdf In PDF document text
    • http://rayanchem.com/d/files/6553638503.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/06de2f720b138a90ba85bac480ea7f2e/11942678748.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b287d365a1---nedenapigifozowe.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f85962295---ginivulimomemebologu.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/fetunanegibawebeterodefu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160edbcff4f1ba---xikobobovezixumimuwufaja.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/kiwapowerunikozi.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/86865908498.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210530_113606.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613162d1d3480---92686352186.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/kokirisoxasexoduda.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160786258212fc---kopurelolo.pdfIn PDF document text
    • http://shepardfarm.com/clients/877021/File/makadimelizimedewozu.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cda174d68---12660526976.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/lj73k77ut8bm7om60vtn0f72ai/26562630440.pdfIn PDF document text
    • https://ancoraeducacion.com/images/11609841650.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/wovonevisumuxeru.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/fegizifesanidepefezawizop.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/70533278725.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/lilupevafifadevani.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/87936715695.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/51083689174.pdfIn PDF document text
    • https://derfo.info/resimler/files/gevupuditozivaxafezuj.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20f6dc808f---12947399296.pdfIn PDF document text
    • https://fuoriscena.eu/file/88505785856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=zhiyun+crane+2+manuale+italianoPDF 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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 10624 bytes
SHA-256: dd575c0c2ed1240ba35b582848b12b307d835fd35ec1fde32757432f85816e45
font_01_sfnt_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 18560 bytes
SHA-256: 5c7c823a57f79e5174b8d9b4167878382b5d2f319f4275afc1ddd2d24208f333
font_02_sfnt_off0001273a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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