Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e12a17c21e889e0…

MALICIOUS

PDF

81.5 KB Created: 2021-06-26 12:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2a9b2be5d91bd0171d39cdb66c39cb3b SHA-1: 8b2b7d0c3e57068dd681b99c255210c470be9542 SHA-256: 9e12a17c21e889e0192dcf89b884a68e4148e739821c6b7d4db4b96323bc9fe8
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely serves to redirect the user to one of the listed malicious URLs, which are part of a link farm hosted on disposable or compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=what+is+the+lcm+of+7+and+8 PDF link annotation
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/99672a7a6bae64f8dbeaafb92c2a8c92/mekiregusudesisadezo.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/girovitoneneluzumiveruzi.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/8e530cae806e26ff289f0eac28ff8188/95794117313.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/sefigoloj.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095b9962f83f---6041472847.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160743f358e852---nidesipoxawunogokado.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e030b8dda8---telimag.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b14643c561b---felekalitubosumavixofi.pdfIn PDF document text
    • https://totounited.com/contents//files/96328303678.pdfIn PDF document text
    • http://humanlitech.com/files/files/75203802179.pdfIn PDF document text
    • https://langestrand.se/anvandarbilder/204/files/72206290974.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/286a79ef59b7caa7cc1eebe47c894dfb/42077630599.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6da6617ea---refimemosexuxonixo.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/638431ea1f1e45d3e138c9f724dbbcf0/21587484928.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a819807f75b---finolilojowu.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/43677391900.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f484d39110042e587c068b82f936edfe/mumazilatajisuwufimebul.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/xirulelubeduxiduf.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/fofuxaxitibinozet.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/9e63ec9b316205724643946325039ab1/3338050024.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/201f762b28ee20904dee02819ac75cca/dokajugovizuza.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/126abe5266a16e38a0c302404e346527/29509271410.pdfIn PDF document text
    • http://irodori.kir.jp/files/file/totigojigel.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC730 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_01_sfnt_off0000dd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 16192 bytes
SHA-256: 74cc6b399fdcba0f301ccc31cd09869a35a4264a0cfad8a81a0fb61837c280d7
font_02_sfnt_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F36 10892 bytes
SHA-256: bcc680308f873f040c94c7d0b3e02f6ec9ed9a522c70b9c0bb34e4fa45178be6

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