Malicious PDF — malware analysis report

Static analysis result for SHA-256 b384605cc3dbab7a…

MALICIOUS

PDF

73.3 KB Created: 2021-09-24 02:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 521469695faa1087c6c5086f69c0aca9 SHA-1: 8798145227b4585faa25f8db2048f03896d6818c SHA-256: b384605cc3dbab7a781dfd64431d310fcfcddfe0c59192d46e096f2cc6bd5772
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various URLs, many hosted on compromised CMS platforms, under the guise of content like 'mobile legends senki download'. The presence of external URIs and link farms suggests an attempt to redirect users to phishing or malware distribution sites. No scripts were extracted, but the overall structure and URL patterns point to a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=mobile+legends+senki+download PDF link annotation
    • http://goldartline.ua/userfiles/file/54541788207.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/setudevifawamez.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8958eb871---jikedavilopefujarofezafu.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/sagijalozivorekivez.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/32485224390.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/9evu9lqaphokoivsrdi4g1nuk4/nuwozunejojubaxufifege.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109140544136777.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/luvukekarirodefujaf.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/42956417323.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/3a3b2ce89793907e7d5fe561045f3347/zazowunipafafokuju.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2451028805aaddf27f97e98dcdc6ff1f/24837976197.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/61663082801.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/xizawamugekevodekubepaj.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/vulapezamigaxebap.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16149638761dc5---17696868373.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/75669a191a2eef3b880d768aaf757dff/95101659583.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/080603084954.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/19442088187.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/27052030543.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5c528763e---zogobodobuzeziwotewab.pdfIn PDF document text
    • https://agt.twwebmarket.com/ckfinder/userfiles/files/83330700162.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/mujigipepaludumapudolu.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/39543310580.pdfIn PDF document text
    • http://darec.sk/files/files/ratufatir.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_off0000be64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD676 16024 bytes
SHA-256: 42075b1b863a712e0104d8bae0656ab79e315ef9b79400a7bca92d6aa140144f
font_02_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 10536 bytes
SHA-256: e6bc2fcb8f809bb5fbcd111694679f48d9d193fa6f257d80d49c371a4a34f62f

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