Malicious PDF — malware analysis report

Static analysis result for SHA-256 b301dcc36bf6dcd8…

MALICIOUS

PDF

77.2 KB Created: 2021-09-06 00:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7ff3302d7f8981da9badec686bb9003c SHA-1: d7a76b542a1eead1070008d52e7cb0082292b06c SHA-256: b301dcc36bf6dcd8d3990be35f8bc63aaa7fca0e18298e50ef6401a807b04e2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple domains, including compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous external URIs and link farm heuristics points to the T1204.002 (Malicious Link) technique, and the nature of the file suggests it could be delivered via T1566.001 (Spearphishing Attachment).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://keyword-lda.pt/site/upload/file/rarulam.pdf In PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/c6578b96982845cf288faf358f84eab3/sefedufokuwadope.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/9304bcce5c526612c8d89ef11a8af9d5/21715482107.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/gepetopatenasi.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/10745875112.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/i6enq3laiki87sjjv04udc8em1/bevuweberutuxa.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/wubevesakurud.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/rexubenobesufusebi.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/71878407133.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e3397f1f739803c334e97a003b23a945/2215226278.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/zowotuxoduzevixizegun.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/sedabepidilel.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/tedisozemovixuxove.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/62f817a0c01fd716f22d4e4bd2f7456e/19641567080.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/50410004581.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/74954181068.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607439ee469ad---27906044165.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/23775846357.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/85272685781.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da3fdc9d8ea---33368693403.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/11666447410.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/gazuju.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609200d21fdb1---silidupi.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/mudajujodigoxagoja.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612c6ce2b5b62---436419664.pdfIn PDF document text
    • https://euchebnici.com/img/file/93630661115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=landscape+irrigation+design+manual+rain+birdPDF 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_off0000c63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63B 18484 bytes
SHA-256: 83483f39869bd0299c08f4a23bd066f71df939392bdc899aba3de02d7895b832
font_01_sfnt_off0000f5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DED 11052 bytes
SHA-256: 3b7c81409ca1c4caaaa9019caadc924048bd53e13a15c4c387d0eb9b1c76254c

Open this report in the interactive analyzer, or submit your own file for analysis.