Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ae1e1c3a052615…

MALICIOUS

PDF

78.4 KB Created: 2021-06-26 16:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0c4deb336ac6b24be08aa8ace83b6cd7 SHA-1: c5be1afe6c0a71e06da128fe767b0d50611ef394 SHA-256: e1ae1e1c3a0526156a1c55e850fd9819494e361d962e22d553082773fb1d7e8b
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to execute the embedded JavaScript. The primary goal appears to be directing users to malicious sites disguised as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • 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://chcial.ru/uplcv?utm_term=kingdom+of+blood+and+ash+read+online PDF link annotation
    • https://pharma-tools.eu/galeria/file/88661055719.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ad6b4ee88c37dc69e8fc39c45b62f0eb/rimejujijuvibixoripim.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/09c2e1889c39ba40e9cc6e2ea1a7b521/62564765109.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1q34m8oddhkpm0ebq22ptj9vnt/kitejukaverimumekokoso.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/1i43q2b3fj4gtk1s90emuru0t6/91884305024.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/jonujoledokodege.pdfIn PDF document text
    • http://short-story.ru/upload/file/99498774197.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/kujeduwirawomigof.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2105241608294719301c4zuw.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c512519f74e---mevekaduzanuxez.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/6893509869.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/56860978644.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608162c6dbae5---56345489022.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/91916179729.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/9974775668.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051910581345.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/65223474732.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/6765460378.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/065cf16ddb20c7236864ddcc81bfb988/4363795522.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/jo5lvqf2oeiaf1e9rmor0uriel/tawikidawixono.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609748c0ee105---siginazukene.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/714137a43739abfc9b1fe9a027645015/95656894530.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073d578057dd---situwekotaxuwepudukofatud.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_off0000cff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF6 16800 bytes
SHA-256: 556dd75c4dcb2601b12e4037be81e0a40c0fe7c6c185382e263c0c9592d56fd9
font_01_sfnt_off0000fb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB97 10832 bytes
SHA-256: efd73fa59d8c798b018818e8e51cc73af3ede5ff99da4ca146c89c827af0839a
font_02_sfnt_off0001141a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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