Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec8a118f51a43f0…

MALICIOUS

PDF

68.1 KB Created: 2021-09-25 02:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8ddfece1df3618fd4797b6f4425dd524 SHA-1: bd11a69974b1a6385035903771af79deb077c91b SHA-256: 9ec8a118f51a43f034ddfdfb41d98d4266e93526341946f83e32f06709c0e979
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It employs a common phishing tactic by presenting as an image-only document with a clickable action, typical of a screenshot lure. The embedded URLs, such as 'http://seanmore.com/userData/board/file/54004359058.pdf', suggest a link farm designed to redirect users to malicious content or further stages of an attack. No scripts were extracted, but the PDF structure and heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://seanmore.com/userData/board/file/54004359058.pdf In PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/92444256238.pdfIn PDF document text
    • https://samsungklimamodelleri.com/upload/ckfinder/files/vonikedonen.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/vabovovebujixu.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/46257420422.pdfIn PDF document text
    • https://nichebearing.leaddeehub.com/userfiles/files/2398141164.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/kojabukefesojotuzuxenorib.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/donijuborax.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/18177818701.pdfIn PDF document text
    • https://renetravel.ro/images/files/41739475725.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/fllkaelbec21ru31vdicb0bm73/87751073970.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/64785275505.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/74410686489.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136498030514---74901526504.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/susejogabidiriwozezu.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/sovatelizawigosawa.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/nadidenarowenigoditaki.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/dovifufasev.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/tigugulobizovafozug.pdfIn PDF document text
    • https://ppkh.net/userfiles/file/zamugabewapajebu.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/bovofukekegatadopekomedut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=gta+5+full+version+free+download+for+androidPDF 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_off0000ad7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC596 10772 bytes
SHA-256: 033b0710db523865a26bfc91ffb02c86768c7ce5a6194e342b574a0f69e4d670
font_02_sfnt_off0000dea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA6 14460 bytes
SHA-256: 2101a94085b4a57b7c66bf340afb76ad68fb489331412f345b7f6ea5acb0cd6a