Malicious PDF — malware analysis report

Static analysis result for SHA-256 c32805d8615b9364…

MALICIOUS

PDF

83.8 KB Created: 2021-08-20 23:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1d627c3e9014ad0e71c0a91f88063e7f SHA-1: 1de0105c0b7376c1422b37f039770de0d431e82e SHA-256: c32805d8615b9364e3f387403806dcee211515f3597263386848ba9bfd2b9acb
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 ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=what+are+some+facts+and+opinions PDF link annotation
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/80288023511.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/prfabfi74lnmtdc66iqqpf7rm4/sapudububukigoximupi.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af545136fd---tidanitu.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f7747d5e0---90078313798.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/e176l6qj1r4518uk0beo8sst8k/nogejelutadifol.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f790b972c941f8aeefc27751fda3c8d/26982854862.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f034bf39c06---72937382025.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/79676143198.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/e84f83782b4548d3ea26c9418791d46f/rabefedidigobaretojajoda.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160958b252c3a6---rivumerexopivekudinifomif.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/xederemomemexurome.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fad8f1b8abc---29594654191.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/fepabexeriv.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/43131961082.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611fdec398fdc---wopupeguzez.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/39655a1da0f28d1a4cfd3c033a3c5ea2/jofowadinepatukuzejabe.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/wepulagikesozase.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/wosamoreliwum.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ccc95297d---56966776746.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/sl0p79jr7foe1hr05uffag59tg/6261172128.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/tozagisitutesu.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/fisukagasuxewas.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/ru8jkh05kmm4el16kbhvo2uc51/fasuwarizegorivorutafod.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EA 10832 bytes
SHA-256: 00c1892aa1bbe0fee231a30902b8a30aa9e5df433a53a5ef326205dfdcd36431
font_02_sfnt_off000112c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C3 17776 bytes
SHA-256: b3687747622aa1e59a33d87dd57e72dcc23a3bbb283b219b61532be404b1f050

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