Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12dae4d6930af68…

MALICIOUS

PDF

85.1 KB Created: 2021-07-19 10:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7ed8d4cff1a114f851117a72c0519158 SHA-1: 4235111723dbddc34a987fd6bc98291ff30a2312 SHA-256: f12dae4d6930af68e7a8cc6f7fcc49b08ef498f76f720cb596d233156f7e7f4c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/02a4231909cb51517fab37134db6a6d8/kololu.pdf In PDF document text
    • http://doubler-son-capital.com/photos/files/tarabudawirewupegewafo.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16085f8e42b617---37500710327.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/jaxabigikegabujadazat.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/pijozidural.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f05732fb---4026443261.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/0c23966269acc82bfaedce9a3006a8b4/50325302089.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c328ad134b5---7561699765.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/14883424417.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/9feb75b00a45959e078488c4742d13dd/640422561.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/xabanepeso.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/e8svbcvt4bbcfd4oom3g3qlhs8/najumijugadak.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/togowimugesipusoti.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/70487608885.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/bijodiboxowovel.pdfIn PDF document text
    • http://derma-dts.de/files/file/jusuzeruvisewos.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/5d2cf89cfcc6eb66a04561777a430b39/xudagoguleju.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/dikoluzisezorovitavelibu.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/94585099538.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1609fff5e15b7d---wolosakezumefimafenofu.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/fimukadov.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/bufusakuzekusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=apa+7th+edition+citation+powerpointPDF 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_off0000e837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE837 17736 bytes
SHA-256: 5c93106b74607732f946ab49042a71a83e55267f354a7bf223cbf9229d9eff14
font_01_sfnt_off000116d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D0 10516 bytes
SHA-256: d8cdaf1de3531b8c51f98bd543af1e892a6dd56f53a887fe02af39aee8d20e39
font_02_sfnt_off00012ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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