Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e9aaecefc90686…

MALICIOUS

PDF

71.0 KB Created: 2021-09-04 23:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 93aa77fa6d943ae09214fba13c5977df SHA-1: ff7b0e445b711b9d344045be5a64ea7017c59546 SHA-256: 65e9aaecefc906868605cd2e68a768cf7454c4534d4508987da1e91f6fc0e618
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://dakotaterritorydevelopment.com/ckfinder/userfiles/files/vubone.pdf In PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/94601507d2dc3e03a5a252ee5abb4ead/kuwopezowaxefuzus.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/37373742344.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/36478068484.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607890f7d8f69---derudokolopezezemufi.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/midefavopufigoguwinilugif.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/xajiwogutapu.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/43384670156.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/24645965392.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/388709554.pdfIn PDF document text
    • https://academiapreprod.riportico.com/userfiles/files/18107547165.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/xikimede.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb58bfecbdf---gusejojabagopegud.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/bidab.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a2411510f---22020143633.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/2166152756.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16098325773c0b---zunoxoxewikofa.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/59588b5e76ddcb7d413afaaadf8dc75c/11525409555.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/58448106075.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/b69b914af5d7e32a81009b8cb8a38c66/92777990053.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/68421a88058df0ea84449a5514f779bd/29839203092.pdfIn PDF document text
    • http://rld-carbon.ru/file/61277531127.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ley+de+propiedad+horizontal+pdf+2017PDF 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_off0000b6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 15600 bytes
SHA-256: f74601550d7400250d4e5f69aa0e3eae15060b50214666a3aa92ae0a3d3a2d81
font_02_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 10900 bytes
SHA-256: 7bb57eef0d556439250b65c457b9c4bf2644ee83c581ca985b0433544d15cc9f

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