Malicious PDF — malware analysis report

Static analysis result for SHA-256 7482ea12bc03d31e…

MALICIOUS

PDF

80.8 KB Created: 2021-09-16 04:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b28e02bdc8a4bd821a6baf39153dc0ec SHA-1: 4c4c5d6e4c9645f4cf77fc2eb18877b8c68b3d82 SHA-256: 7482ea12bc03d31e5e9fd16da2eb392e5f96ecea76acf1476b151e17c845dd70
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains a large number of embedded URLs, many of which point to disposable domains or are structured as link farms, suggesting a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true malicious destination. No scripts were extracted, but the sheer volume of suspicious URLs points to a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=watch32+movie+online+cinema PDF link annotation
    • http://travelspace.pl/userfiles/file/puwisovukojugadanojagekab.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/riwovedenuzuzozu.pdfIn PDF document text
    • http://mkbeauty.vn/luutru/files/60969264392.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/fased.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/62757574456.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc22ca3fe6---71447377977.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/ponutajarugikowi.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/56946827278.pdfIn PDF document text
    • https://adci.vn/data/upload/file/zuzulugupukeponoj.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/fobuxejife.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/15954252976.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/54039210854.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81897989206.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/63990745299.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/35777844031.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/79331179591.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/92098745097.pdfIn PDF document text
    • http://homestayhoian.vn/uploads/image/files/fudolisemonej.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/kikizadozejamepajeduso.pdfIn PDF document text
    • http://online-cycling.com/files/file/60617659485.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/1941753938.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/supemotur.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/68535366066.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/mojetirusux.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/lazuwodukuvugiteguvo.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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF143 10580 bytes
SHA-256: 36e195d4caee3121708b209afae12b9bf4197d5dcf263cfb4398180c0cafa13c
font_02_sfnt_off00010954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10954 17188 bytes
SHA-256: 9fa6b98820e89fb31f2a340bab921daa963501dca89c8b3064bd7be1f83837fd