Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10b23b6bc0807d0…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 20:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 10ed156f5e0a38f8eda04806895c9d83 SHA-1: 7f9e057996a9b8d6219cc566ea405e11e0c7c21a SHA-256: a10b23b6bc0807d0cdf73c37de273e2d039f9774d2256c9875a75b48ae1e3075
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • 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://laborke.ru/uplcv?utm_term=best+finishing+badges+for+point+guard+2k20 PDF link annotation
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/paduwevegazupotufapamame.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/56138758538.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/bixivufimimi.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9cf7d9084---26659654877.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/tufivolamazulelofuxi.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/zobamafopomidanowixizatog.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4863843f3---bedusal.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/67401630324.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/71505824310.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/62103571069.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/73147340879.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/sufuzerezetemefusalun.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/78542425169.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/8376025709.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/tatekaseluka.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/df74e79e45b28ea20f86cab8df2377ec/84247812890.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16120fad298d90---buwixopiwiwasojuzasimajoj.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/79040826582.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/kaxuk.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/98801512245.pdfIn PDF document text
    • http://navrattan.co/userfiles/file/81995067375.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/labanikixaduliretibe.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 17724 bytes
SHA-256: 69f6eafc44a9048b872b0c8700c31e82cfdb908a21624e092c9a1e8ae744fa31
font_01_sfnt_off00010b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001235e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1235E 11356 bytes
SHA-256: afe36817d30da65215fd5c8bbd824c70ecf204a934df280a3ad78a9769613a00

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